3X^2+6X=90

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Solution for 3X^2+6X=90 equation:


Simplifying
3X2 + 6X = 90

Reorder the terms:
6X + 3X2 = 90

Solving
6X + 3X2 = 90

Solving for variable 'X'.

Reorder the terms:
-90 + 6X + 3X2 = 90 + -90

Combine like terms: 90 + -90 = 0
-90 + 6X + 3X2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(-30 + 2X + X2) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-30 + 2X + X2)' equal to zero and attempt to solve: Simplifying -30 + 2X + X2 = 0 Solving -30 + 2X + X2 = 0 Begin completing the square. Move the constant term to the right: Add '30' to each side of the equation. -30 + 2X + 30 + X2 = 0 + 30 Reorder the terms: -30 + 30 + 2X + X2 = 0 + 30 Combine like terms: -30 + 30 = 0 0 + 2X + X2 = 0 + 30 2X + X2 = 0 + 30 Combine like terms: 0 + 30 = 30 2X + X2 = 30 The X term is 2X. Take half its coefficient (1). Square it (1) and add it to both sides. Add '1' to each side of the equation. 2X + 1 + X2 = 30 + 1 Reorder the terms: 1 + 2X + X2 = 30 + 1 Combine like terms: 30 + 1 = 31 1 + 2X + X2 = 31 Factor a perfect square on the left side: (X + 1)(X + 1) = 31 Calculate the square root of the right side: 5.567764363 Break this problem into two subproblems by setting (X + 1) equal to 5.567764363 and -5.567764363.

Subproblem 1

X + 1 = 5.567764363 Simplifying X + 1 = 5.567764363 Reorder the terms: 1 + X = 5.567764363 Solving 1 + X = 5.567764363 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + X = 5.567764363 + -1 Combine like terms: 1 + -1 = 0 0 + X = 5.567764363 + -1 X = 5.567764363 + -1 Combine like terms: 5.567764363 + -1 = 4.567764363 X = 4.567764363 Simplifying X = 4.567764363

Subproblem 2

X + 1 = -5.567764363 Simplifying X + 1 = -5.567764363 Reorder the terms: 1 + X = -5.567764363 Solving 1 + X = -5.567764363 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + X = -5.567764363 + -1 Combine like terms: 1 + -1 = 0 0 + X = -5.567764363 + -1 X = -5.567764363 + -1 Combine like terms: -5.567764363 + -1 = -6.567764363 X = -6.567764363 Simplifying X = -6.567764363

Solution

The solution to the problem is based on the solutions from the subproblems. X = {4.567764363, -6.567764363}

Solution

X = {4.567764363, -6.567764363}

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