d^2-8=-4

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Solution for d^2-8=-4 equation: 


Simplifying
d2 + -8 = -4

Reorder the terms:
-8 + d2 = -4

Solving
-8 + d2 = -4

Solving for variable 'd'.

Move all terms containing d to the left, all other terms to the right.

Add '8' to each side of the equation.
-8 + 8 + d2 = -4 + 8

Combine like terms: -8 + 8 = 0
0 + d2 = -4 + 8
d2 = -4 + 8

Combine like terms: -4 + 8 = 4
d2 = 4

Simplifying
d2 = 4

Take the square root of each side:
d = {-2, 2}

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