5x^2-40x+144=0

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Solution for 5x^2-40x+144=0 equation:


Simplifying
5x2 + -40x + 144 = 0

Reorder the terms:
144 + -40x + 5x2 = 0

Solving
144 + -40x + 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'.
28.8 + -8x + x2 = 0

Move the constant term to the right:

Add '-28.8' to each side of the equation.
28.8 + -8x + -28.8 + x2 = 0 + -28.8

Reorder the terms:
28.8 + -28.8 + -8x + x2 = 0 + -28.8

Combine like terms: 28.8 + -28.8 = 0.0
0.0 + -8x + x2 = 0 + -28.8
-8x + x2 = 0 + -28.8

Combine like terms: 0 + -28.8 = -28.8
-8x + x2 = -28.8

The x term is -8x.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8x + 16 + x2 = -28.8 + 16

Reorder the terms:
16 + -8x + x2 = -28.8 + 16

Combine like terms: -28.8 + 16 = -12.8
16 + -8x + x2 = -12.8

Factor a perfect square on the left side:
(x + -4)(x + -4) = -12.8

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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