Answer:
this is easy just do 12-(-8)= 12+8=20
so the answer is 20
Step-by-step explanation:
X²+7x-30
=x²+10x-3x-30
=x(x+10)-3(x+10)
=(x+10)(x-3)
Hope my answer helped u :)
Answer:
i think its either 120 or 140
ANSWER
We need to add half the coefficient of
all square.

EXPLANATION
Given the equation,
.
We compare to the general equation,

This means that;

To complete the square we add, 
That is
.
Hence the number to be added to both sides is
.
Note that before we complete the square, the coefficient of the term in
must always be 1.
+20 because when u deposit your adding money