5x^2+39x+60=

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Solution for 5x^2+39x+60= equation:


Simplifying
5x2 + 39x + 60 = 0

Reorder the terms:
60 + 39x + 5x2 = 0

Solving
60 + 39x + 5x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
5 the coefficient of the squared term: 

Divide each side by '5'.
12 + 7.8x + x2 = 0

Move the constant term to the right:

Add '-12' to each side of the equation.
12 + 7.8x + -12 + x2 = 0 + -12

Reorder the terms:
12 + -12 + 7.8x + x2 = 0 + -12

Combine like terms: 12 + -12 = 0
0 + 7.8x + x2 = 0 + -12
7.8x + x2 = 0 + -12

Combine like terms: 0 + -12 = -12
7.8x + x2 = -12

The x term is 7.8x.  Take half its coefficient (3.9).
Square it (15.21) and add it to both sides.

Add '15.21' to each side of the equation.
7.8x + 15.21 + x2 = -12 + 15.21

Reorder the terms:
15.21 + 7.8x + x2 = -12 + 15.21

Combine like terms: -12 + 15.21 = 3.21
15.21 + 7.8x + x2 = 3.21

Factor a perfect square on the left side:
(x + 3.9)(x + 3.9) = 3.21

Calculate the square root of the right side: 1.791647287

Break this problem into two subproblems by setting 
(x + 3.9) equal to 1.791647287 and -1.791647287.

Subproblem 1

x + 3.9 = 1.791647287 Simplifying x + 3.9 = 1.791647287 Reorder the terms: 3.9 + x = 1.791647287 Solving 3.9 + x = 1.791647287 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.9' to each side of the equation. 3.9 + -3.9 + x = 1.791647287 + -3.9 Combine like terms: 3.9 + -3.9 = 0.0 0.0 + x = 1.791647287 + -3.9 x = 1.791647287 + -3.9 Combine like terms: 1.791647287 + -3.9 = -2.108352713 x = -2.108352713 Simplifying x = -2.108352713

Subproblem 2

x + 3.9 = -1.791647287 Simplifying x + 3.9 = -1.791647287 Reorder the terms: 3.9 + x = -1.791647287 Solving 3.9 + x = -1.791647287 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.9' to each side of the equation. 3.9 + -3.9 + x = -1.791647287 + -3.9 Combine like terms: 3.9 + -3.9 = 0.0 0.0 + x = -1.791647287 + -3.9 x = -1.791647287 + -3.9 Combine like terms: -1.791647287 + -3.9 = -5.691647287 x = -5.691647287 Simplifying x = -5.691647287

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-2.108352713, -5.691647287}

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