-49=-4d^2

Solution for -49=-4d^2 equation:

Simplifying
-49 = -4d2

Solving
-49 = -4d2

Solving for variable 'd'.

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

Add '4d2' to each side of the equation.
-49 + 4d2 = -4d2 + 4d2

Combine like terms: -4d2 + 4d2 = 0
-49 + 4d2 = 0

Add '49' to each side of the equation.
-49 + 49 + 4d2 = 0 + 49

Combine like terms: -49 + 49 = 0
0 + 4d2 = 0 + 49
4d2 = 0 + 49

Combine like terms: 0 + 49 = 49
4d2 = 49

Divide each side by '4'.
d2 = 12.25

Simplifying
d2 = 12.25

Take the square root of each side:
d = {-3.5, 3.5}