Answer:
use foil method-first inside outside last
Step-by-step explanation:
X = -10
Adding negative ten and ten results in zero, and zero multiplied by anything is, of course, still zero.
(-10 + 10) * (-10 + 10) = 0
0 * 0 = 0
X=-10
Because (x+10)(x+10)=0
So it becomes (x+10)^2=0
And therefore x=-10
