5x(5x-12)=-72

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Solution for 5x(5x-12)=-72 equation:


Simplifying
5x(5x + -12) = -72

Reorder the terms:
5x(-12 + 5x) = -72
(-12 * 5x + 5x * 5x) = -72
(-60x + 25x2) = -72

Solving
-60x + 25x2 = -72

Solving for variable 'x'.

Reorder the terms:
72 + -60x + 25x2 = -72 + 72

Combine like terms: -72 + 72 = 0
72 + -60x + 25x2 = 0

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

Divide each side by '25'.
2.88 + -2.4x + x2 = 0

Move the constant term to the right:

Add '-2.88' to each side of the equation.
2.88 + -2.4x + -2.88 + x2 = 0 + -2.88

Reorder the terms:
2.88 + -2.88 + -2.4x + x2 = 0 + -2.88

Combine like terms: 2.88 + -2.88 = 0.00
0.00 + -2.4x + x2 = 0 + -2.88
-2.4x + x2 = 0 + -2.88

Combine like terms: 0 + -2.88 = -2.88
-2.4x + x2 = -2.88

The x term is -2.4x.  Take half its coefficient (-1.2).
Square it (1.44) and add it to both sides.

Add '1.44' to each side of the equation.
-2.4x + 1.44 + x2 = -2.88 + 1.44

Reorder the terms:
1.44 + -2.4x + x2 = -2.88 + 1.44

Combine like terms: -2.88 + 1.44 = -1.44
1.44 + -2.4x + x2 = -1.44

Factor a perfect square on the left side:
(x + -1.2)(x + -1.2) = -1.44

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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