Answer:
-8, 7
Step-by-step explanation:
Set up an equation.
<em>x² + x = 56</em>
Set the equation equal to zero and factor.
<em>x² + x - 56 = 0</em>
<em>(x + 8)(x - 7) = 0</em>
Solve for x.
<em>x + 8 = 0</em>
<em>x = -8</em>
<em>x - 7 = 0</em>
<em>x = 7</em>
The possible x values are -8 and 7.
Answer:
0.5
Step-by-step explanation:
Answer:
D. 64
Step-by-step explanation:
-2(square root of x) + 4 = -12
-2(square root of x) = -12 - 4
-2(square root of x) = -16
divide by negative 2 both sides
square root of x = 8
the we square both sides
(square root of x)^2 = (8)^2
therefore x = 64