How do you simplify x2+2x35x2+4x21x2+3x18x2+9x+18?

1 Answer
Jul 25, 2015

Simplify quadratic expression f(x)

Ans:x5x+3

Explanation:

First factor all the trinomials:
(x2+2x35)=(x5)(x+7); (x2+3x18)=(x3)(x+6)

(x2+4x21)=(x+7)(x3); (x2+9x+18)=(x+3)(x+6)

f(x)=(x5)(x+7)(x+7)(x3).(x3)(x+6)(x+3)(x+6)=

=x5x+3