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Simplifying
4d2 + 9 = 12
Reorder the terms:
9 + 4d2 = 12
Solving
9 + 4d2 = 12
Solving for variable 'd'.
Move all terms containing d to the left, all other terms to the right.
Add '-9' to each side of the equation.
9 + -9 + 4d2 = 12 + -9
Combine like terms: 9 + -9 = 0
0 + 4d2 = 12 + -9
4d2 = 12 + -9
Combine like terms: 12 + -9 = 3
4d2 = 3
Divide each side by '4'.
d2 = 0.75
Simplifying
d2 = 0.75
Take the square root of each side:
d = {-0.866025404, 0.866025404}
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