15x^2+60x=55

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Solution for 15x^2+60x=55 equation:


Simplifying
15x2 + 60x = 55

Reorder the terms:
60x + 15x2 = 55

Solving
60x + 15x2 = 55

Solving for variable 'x'.

Reorder the terms:
-55 + 60x + 15x2 = 55 + -55

Combine like terms: 55 + -55 = 0
-55 + 60x + 15x2 = 0

Factor out the Greatest Common Factor (GCF), '5'.
5(-11 + 12x + 3x2) = 0

Ignore the factor 5.

Subproblem 1

Set the factor '(-11 + 12x + 3x2)' equal to zero and attempt to solve: Simplifying -11 + 12x + 3x2 = 0 Solving -11 + 12x + 3x2 = 0 Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. -3.666666667 + 4x + x2 = 0 Move the constant term to the right: Add '3.666666667' to each side of the equation. -3.666666667 + 4x + 3.666666667 + x2 = 0 + 3.666666667 Reorder the terms: -3.666666667 + 3.666666667 + 4x + x2 = 0 + 3.666666667 Combine like terms: -3.666666667 + 3.666666667 = 0.000000000 0.000000000 + 4x + x2 = 0 + 3.666666667 4x + x2 = 0 + 3.666666667 Combine like terms: 0 + 3.666666667 = 3.666666667 4x + x2 = 3.666666667 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 = 3.666666667 + 4 Reorder the terms: 4 + 4x + x2 = 3.666666667 + 4 Combine like terms: 3.666666667 + 4 = 7.666666667 4 + 4x + x2 = 7.666666667 Factor a perfect square on the left side: (x + 2)(x + 2) = 7.666666667 Calculate the square root of the right side: 2.768874621 Break this problem into two subproblems by setting (x + 2) equal to 2.768874621 and -2.768874621.

Subproblem 1

x + 2 = 2.768874621 Simplifying x + 2 = 2.768874621 Reorder the terms: 2 + x = 2.768874621 Solving 2 + x = 2.768874621 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 = 2.768874621 + -2 Combine like terms: 2 + -2 = 0 0 + x = 2.768874621 + -2 x = 2.768874621 + -2 Combine like terms: 2.768874621 + -2 = 0.768874621 x = 0.768874621 Simplifying x = 0.768874621

Subproblem 2

x + 2 = -2.768874621 Simplifying x + 2 = -2.768874621 Reorder the terms: 2 + x = -2.768874621 Solving 2 + x = -2.768874621 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 = -2.768874621 + -2 Combine like terms: 2 + -2 = 0 0 + x = -2.768874621 + -2 x = -2.768874621 + -2 Combine like terms: -2.768874621 + -2 = -4.768874621 x = -4.768874621 Simplifying x = -4.768874621

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.768874621, -4.768874621}

Solution

x = {0.768874621, -4.768874621}

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