-3j^2+54j=15

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Solution for -3j^2+54j=15 equation:


Simplifying
-3j2 + 54j = 15

Reorder the terms:
54j + -3j2 = 15

Solving
54j + -3j2 = 15

Solving for variable 'j'.

Reorder the terms:
-15 + 54j + -3j2 = 15 + -15

Combine like terms: 15 + -15 = 0
-15 + 54j + -3j2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(-5 + 18j + -1j2) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-5 + 18j + -1j2)' equal to zero and attempt to solve: Simplifying -5 + 18j + -1j2 = 0 Solving -5 + 18j + -1j2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. 5 + -18j + j2 = 0 Move the constant term to the right: Add '-5' to each side of the equation. 5 + -18j + -5 + j2 = 0 + -5 Reorder the terms: 5 + -5 + -18j + j2 = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -18j + j2 = 0 + -5 -18j + j2 = 0 + -5 Combine like terms: 0 + -5 = -5 -18j + j2 = -5 The j term is -18j. Take half its coefficient (-9). Square it (81) and add it to both sides. Add '81' to each side of the equation. -18j + 81 + j2 = -5 + 81 Reorder the terms: 81 + -18j + j2 = -5 + 81 Combine like terms: -5 + 81 = 76 81 + -18j + j2 = 76 Factor a perfect square on the left side: (j + -9)(j + -9) = 76 Calculate the square root of the right side: 8.717797887 Break this problem into two subproblems by setting (j + -9) equal to 8.717797887 and -8.717797887.

Subproblem 1

j + -9 = 8.717797887 Simplifying j + -9 = 8.717797887 Reorder the terms: -9 + j = 8.717797887 Solving -9 + j = 8.717797887 Solving for variable 'j'. Move all terms containing j to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + j = 8.717797887 + 9 Combine like terms: -9 + 9 = 0 0 + j = 8.717797887 + 9 j = 8.717797887 + 9 Combine like terms: 8.717797887 + 9 = 17.717797887 j = 17.717797887 Simplifying j = 17.717797887

Subproblem 2

j + -9 = -8.717797887 Simplifying j + -9 = -8.717797887 Reorder the terms: -9 + j = -8.717797887 Solving -9 + j = -8.717797887 Solving for variable 'j'. Move all terms containing j to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + j = -8.717797887 + 9 Combine like terms: -9 + 9 = 0 0 + j = -8.717797887 + 9 j = -8.717797887 + 9 Combine like terms: -8.717797887 + 9 = 0.282202113 j = 0.282202113 Simplifying j = 0.282202113

Solution

The solution to the problem is based on the solutions from the subproblems. j = {17.717797887, 0.282202113}

Solution

j = {17.717797887, 0.282202113}

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