Question

Please simplify
(X^2+4x-21)/(x+7)

Answer 1

\[(x^2+4x-21)/(x+7)\]

Answer 2

\[{(x-3)(x+7)}/(x+7)=(x-3) so x=3\]

Answer 3

@sstrin

Answer 4

X^2+4x-21 =x^2+7x-3x-21
=x(x+7)-3(x+7)
=(x+7)(x-3)
(X^2+4x-21)/(x+7)=(x+7)(x-3)/(x+7)
=x-3

Source: http://www.mathskey.com/question2answer/