(x + 10)(x + 2)
3x3+12x = 3x(x2+4)
x2 + 12x + 32 = (x + 8)(x + 4)
x2 + 12x + 32 = (x + 4)(x + 8)
x2-12x+35 = (x-5)(x-7)
x + 12x + 20 = (x + 10)(x + 2)
x2-12x+20=0you can factor this equation into:(x-10)(x-2)=0set each factor equal to zero & solve for x to get:x=10 & x=2
If you mean: x^2 +12x +20 then it is (x+2)(x+10) when factored
(x + 4)(x + 8)
168
x(x + 4)(x - 3)
x2+12x+28Improved Answer:--x2+12x+28 = (-x+14)(x+2) when factored
The list of choices that you posted with your question doesn't include any factor of that expression.