Welcome :: Homework Help and Answers :: Mathskey.com

Recent Visits

Q&A
Unanswered
Categories
Users
Ask a Question

Welcome to Mathskey.com Question & Answers Community. Ask any math/science homework question and receive answers from other members of the community.

Q&A Categories
BASIC MATH (93)
PRE-ALGEBRA (441)
ALGEBRA 1 (2,216)
GEOMETRY (864)
ALGEBRA 2 (2,745)
TRIGONOMETRY (1,186)
PRECALCULUS (1,903)
CALCULUS (2,791)
STATISTICS (129)
PHYSICS (658)
CHEMISTRY (136)
MECHANICAL ENGINEERING (64)
ELECTRICAL ENGINEERING (207)
Winplot Tutorials (2)

Most popular tags

solving-equations system-of-equations functions math slope-intercept-form physics homework-help trigonometric-identities integration substitution-method limits calculus

13,435 questions

17,804 answers

1,438 comments

776,690 users

(3x^7-9)(x^8-9) foil method

0 votes

i need to use the foil system.

foil-system
distributive-property

asked Mar 11, 2014 in ALGEBRA 2 by johnkelly Apprentice

Share this question

Google+ Facebook Twitter LinkedIn Reddit

Please log in or register to add a comment.

Please log in or register to answer this question.

1 Answer

0 votes

Foil method :

$(a+b)(c+d) = \underbrace{ac}_\mathrm{first} + \underbrace{ad}_\mathrm{outside} + \underbrace{bc}_\mathrm{inside} + \underbrace{bd}_\mathrm{last}$

The polynomial is (3x ^7 - 9)(x ^8 - 9)

= (3x ^7)(x ^8) + (3x ^7)(- 9) + (- 9)(x ^8) + (- 9)(- 9)

= 3x ^15 - 27x ^7 - 9x ^8 + 81.

Therefore, (3x ^7 - 9)(x ^8 - 9) = 3x ^15 - 27x ^7 - 9x ^8 + 81.

answered Mar 28, 2014 by lilly Expert

Please log in or register to add a comment.

Related questions

what is the solution for 3(y-10)+1=x(y-8)?

asked Feb 22, 2014 in ALGEBRA 1 by linda Scholar

distributive-property

Select the product of (6x+7)(x^2-4x+4)

asked Mar 3, 2014 in ALGEBRA 1 by dkinz Apprentice

distributive-property

simplify the problem using the distributive property 3x + 4y + 2 (x-y) -y

asked Nov 22, 2013 in ALGEBRA 1 by futai Scholar

distributive-property

Equation with Integers and Distributive Property show work: 4(2x+9)-12-2x=20

asked Nov 27, 2013 in ALGEBRA 1 by chrisgirl Apprentice

distributive-property

multiply 2xy(x^2-xy+4) by applying the distributive property

asked Nov 22, 2013 in ALGEBRA 1 by dkinz Apprentice

distributive-property

solve the equation

asked Sep 29, 2018 in ALGEBRA 2 by anonymous

solve-equation
single-variable-equation
distributive-property

Solve and check the solution

asked Oct 29, 2013 in ALGEBRA 2 by chrisgirl Apprentice

basic-math-properties
distributive-property

Math help, please? Algebra II?

asked Feb 22, 2013 in ALGEBRA 2 by payton Apprentice

inequalities
system-of-equations
distributive-property

which polynomial represents the sum of (2x^6+3x^2+9)+(3x^2+x+8)

asked Mar 11, 2014 in ALGEBRA 2 by mathgirl Apprentice

polynomial-function
sum-of-polynomial-functions

2x+y-z=7, x-2y+2z=-9 and 3x-y+z=5

asked Feb 20, 2014 in ALGEBRA 2 by johnkelly Apprentice

system-of-equations
solving-equations
substitution-method
elimination-method

-3x(x-7)+57x<-8(-7x+8)-3x

asked Dec 9, 2013 in ALGEBRA 2 by linda Scholar

multi-step-inequalities

solve it by substitution method:- 5x - 6y=-9 & 3x + 4y= 25

asked Mar 5, 2014 in ALGEBRA 2 by linda Scholar

system-of-equations
substitution-method
solving-equations

3x +4y +7z=4,2x +3y+z=5 and 3x+4y+z=7 using doolittle's method

asked Feb 20, 2014 in ALGEBRA 2 by mathgirl Apprentice

system-of-equations
solving-equations
substitution-method
elimination-method

3x+9y=11,6x+3y=7 xy by elimination method

asked Dec 4, 2013 in ALGEBRA 2 by angel12 Scholar

system-of-equations
elimination-method

Simplify the following expressions by combining like terms

asked Sep 29, 2018 in PRE-ALGEBRA by anonymous

simplify-expressions
distributive-property
like-terms

solve the equation

asked Sep 29, 2018 in ALGEBRA 1 by anonymous

solve-equation
distributive-property
single-variable-equation

Solve for Z?

asked Sep 5, 2018 in ALGEBRA 1 by rockstar Apprentice

solving-equations
distributive-property

Expand the following expressions and simplify

asked Sep 3, 2018 in ALGEBRA 1 by mathgirl Apprentice

simplify-expressions
distributive-property

Expand the following expressions

asked Sep 3, 2018 in ALGEBRA 1 by mathgirl Apprentice

simplify-expressions
distributive-property

Expand (if needed) and simplify each of the expressions below.

asked Sep 3, 2018 in ALGEBRA 1 by futai Scholar

simplify-expressions
distributive-property
like-terms

Copyright © 2024 MATHSKEY. All Rights Reserved. Sitemap|Terms Of Use|Disclaimer|Contact Us|FAQ

...