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Simplifying
0 = 4d2 + -100
Reorder the terms:
0 = -100 + 4d2
Solving
0 = -100 + 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.
0 + -4d2 = -100 + 4d2 + -4d2
Remove the zero:
-4d2 = -100 + 4d2 + -4d2
Combine like terms: 4d2 + -4d2 = 0
-4d2 = -100 + 0
-4d2 = -100
Divide each side by '-4'.
d2 = 25
Simplifying
d2 = 25
Take the square root of each side:
d = {-5, 5}
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