3X^2-12X=27

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Solution for 3X^2-12X=27 equation:


Simplifying
3X2 + -12X = 27

Reorder the terms:
-12X + 3X2 = 27

Solving
-12X + 3X2 = 27

Solving for variable 'X'.

Reorder the terms:
-27 + -12X + 3X2 = 27 + -27

Combine like terms: 27 + -27 = 0
-27 + -12X + 3X2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(-9 + -4X + X2) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-9 + -4X + X2)' equal to zero and attempt to solve: Simplifying -9 + -4X + X2 = 0 Solving -9 + -4X + X2 = 0 Begin completing the square. Move the constant term to the right: Add '9' to each side of the equation. -9 + -4X + 9 + X2 = 0 + 9 Reorder the terms: -9 + 9 + -4X + X2 = 0 + 9 Combine like terms: -9 + 9 = 0 0 + -4X + X2 = 0 + 9 -4X + X2 = 0 + 9 Combine like terms: 0 + 9 = 9 -4X + X2 = 9 The X term is -4X. Take half its coefficient (-2). Square it (4) and add it to both sides. Add '4' to each side of the equation. -4X + 4 + X2 = 9 + 4 Reorder the terms: 4 + -4X + X2 = 9 + 4 Combine like terms: 9 + 4 = 13 4 + -4X + X2 = 13 Factor a perfect square on the left side: (X + -2)(X + -2) = 13 Calculate the square root of the right side: 3.605551275 Break this problem into two subproblems by setting (X + -2) equal to 3.605551275 and -3.605551275.

Subproblem 1

X + -2 = 3.605551275 Simplifying X + -2 = 3.605551275 Reorder the terms: -2 + X = 3.605551275 Solving -2 + X = 3.605551275 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + X = 3.605551275 + 2 Combine like terms: -2 + 2 = 0 0 + X = 3.605551275 + 2 X = 3.605551275 + 2 Combine like terms: 3.605551275 + 2 = 5.605551275 X = 5.605551275 Simplifying X = 5.605551275

Subproblem 2

X + -2 = -3.605551275 Simplifying X + -2 = -3.605551275 Reorder the terms: -2 + X = -3.605551275 Solving -2 + X = -3.605551275 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + X = -3.605551275 + 2 Combine like terms: -2 + 2 = 0 0 + X = -3.605551275 + 2 X = -3.605551275 + 2 Combine like terms: -3.605551275 + 2 = -1.605551275 X = -1.605551275 Simplifying X = -1.605551275

Solution

The solution to the problem is based on the solutions from the subproblems. X = {5.605551275, -1.605551275}

Solution

X = {5.605551275, -1.605551275}

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