Question

Solve these quadradics by factoring;
x^2 = 14x – 49.
x^2 + 18 = –9x.
4x^2 = 12x + 40.

Answer 1

1. (x-7)^2

Answer 2

1. (x-7)(x-7)
2. (x+6)(x+3)
3.4(x2 -3x-10)=4(x+2)(x-5)

so for 1. x=7
for 2. x=-6 and x=-3
for 3. x=-2 and x=5