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Calculate A.) (3x + 7)^3 B.) 5 + 4^4

0 votes

calculate
associative
property

asked May 24, 2014 in ALGEBRA 1 by marleney Novice

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1 Answer

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A) (3x + 7)³

(a + b)³ = a³+ b ³ + 3ab (a + b)

a = 3x , b = 7

(3x + 7)³ = (3x )³ + 7³ + 3(3x )(7)(3x + 7)

= 27x³ + 343 + 63x (3x + 7)

= 27x³ + 343 + 189x ²+ 441x

= 27x ³ + 189x ² + 441x + 343.

B) 5 + 4⁴

= 5 + (4*4*4*4)

= 5 + 256

= 261

answered May 24, 2014 by david Expert

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