d*d+18(d+4)=-9

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Solution for d*d+18(d+4)=-9 equation:


Simplifying
d * d + 18(d + 4) = -9

Multiply d * d
d2 + 18(d + 4) = -9

Reorder the terms:
d2 + 18(4 + d) = -9
d2 + (4 * 18 + d * 18) = -9
d2 + (72 + 18d) = -9

Reorder the terms:
72 + 18d + d2 = -9

Solving
72 + 18d + d2 = -9

Solving for variable 'd'.

Reorder the terms:
72 + 9 + 18d + d2 = -9 + 9

Combine like terms: 72 + 9 = 81
81 + 18d + d2 = -9 + 9

Combine like terms: -9 + 9 = 0
81 + 18d + d2 = 0

Factor a trinomial.
(9 + d)(9 + d) = 0

Subproblem 1

Set the factor '(9 + d)' equal to zero and attempt to solve: Simplifying 9 + d = 0 Solving 9 + d = 0 Move all terms containing d to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + d = 0 + -9 Combine like terms: 9 + -9 = 0 0 + d = 0 + -9 d = 0 + -9 Combine like terms: 0 + -9 = -9 d = -9 Simplifying d = -9

Subproblem 2

Set the factor '(9 + d)' equal to zero and attempt to solve: Simplifying 9 + d = 0 Solving 9 + d = 0 Move all terms containing d to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + d = 0 + -9 Combine like terms: 9 + -9 = 0 0 + d = 0 + -9 d = 0 + -9 Combine like terms: 0 + -9 = -9 d = -9 Simplifying d = -9

Solution

d = {-9, -9}

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