Question

Please answer theses and show the work

factor each completely
1.-2m^2-18
Example of what you have to do for the following 3
6x^2-12x-48
divide all by 6
6(x^2-2x-8
list factors of 8
8,1
4,2
(x+4) (x-2)

2.-7a^2+50a+7
3.-3x^2+11x-20
4.-x^2+7x-18

Answer 1

2.) 7a^2 + 50a + 7 = 7a^2 + a + 49a + 7 = a(7a + 1) + 7(7a + 1) = (a + 7)(7a + 1)

3.) 3x^2 + 11x - 20 = 3x^2 - 4x + 15x - 20 = x(3x - 4) + 5(3x - 4) = (x + 5)(3x - 4)

4.) x^2 + 7x - 18 = x^2 - 2x + 9x - 18 = x(x - 2) + 9(x - 2) = (x + 9)(x - 2)