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x^2 - 9x +c

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x^2 -9x + c
asked Apr 4 in ALGEBRA 1 by anonymous
reshown Apr 5 by bradely

1 Answer

0 votes

Given expression

x2  - 9x + c

Rewrite the expression

(x)2 - 2(x)(9/2) +(9/2)2 - (9/2)2 + c

Mathematics formulas: (a - b)2 = a2 - 2ab + b2

(x - 9/2)2+ (c - 81/4)

Clearly to make the polynomial a perfect square (c - 81/4) should be zero.

So, c - 81/4 = 0

Add 81/4 to each side.

c = 81/4

Answer :

Therefore c = 81/4

answered Sep 6 by homeworkhelp Mentor

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