(5x+4)(5x+4)-8=(x-10)

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Solution for (5x+4)(5x+4)-8=(x-10) equation:


Simplifying
(5x + 4)(5x + 4) + -8 = (x + -10)

Reorder the terms:
(4 + 5x)(5x + 4) + -8 = (x + -10)

Reorder the terms:
(4 + 5x)(4 + 5x) + -8 = (x + -10)

Multiply (4 + 5x) * (4 + 5x)
(4(4 + 5x) + 5x * (4 + 5x)) + -8 = (x + -10)
((4 * 4 + 5x * 4) + 5x * (4 + 5x)) + -8 = (x + -10)
((16 + 20x) + 5x * (4 + 5x)) + -8 = (x + -10)
(16 + 20x + (4 * 5x + 5x * 5x)) + -8 = (x + -10)
(16 + 20x + (20x + 25x2)) + -8 = (x + -10)

Combine like terms: 20x + 20x = 40x
(16 + 40x + 25x2) + -8 = (x + -10)

Reorder the terms:
16 + -8 + 40x + 25x2 = (x + -10)

Combine like terms: 16 + -8 = 8
8 + 40x + 25x2 = (x + -10)

Reorder the terms:
8 + 40x + 25x2 = (-10 + x)

Remove parenthesis around (-10 + x)
8 + 40x + 25x2 = -10 + x

Solving
8 + 40x + 25x2 = -10 + x

Solving for variable 'x'.

Reorder the terms:
8 + 10 + 40x + -1x + 25x2 = -10 + x + 10 + -1x

Combine like terms: 8 + 10 = 18
18 + 40x + -1x + 25x2 = -10 + x + 10 + -1x

Combine like terms: 40x + -1x = 39x
18 + 39x + 25x2 = -10 + x + 10 + -1x

Reorder the terms:
18 + 39x + 25x2 = -10 + 10 + x + -1x

Combine like terms: -10 + 10 = 0
18 + 39x + 25x2 = 0 + x + -1x
18 + 39x + 25x2 = x + -1x

Combine like terms: x + -1x = 0
18 + 39x + 25x2 = 0

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

Divide each side by '25'.
0.72 + 1.56x + x2 = 0

Move the constant term to the right:

Add '-0.72' to each side of the equation.
0.72 + 1.56x + -0.72 + x2 = 0 + -0.72

Reorder the terms:
0.72 + -0.72 + 1.56x + x2 = 0 + -0.72

Combine like terms: 0.72 + -0.72 = 0.00
0.00 + 1.56x + x2 = 0 + -0.72
1.56x + x2 = 0 + -0.72

Combine like terms: 0 + -0.72 = -0.72
1.56x + x2 = -0.72

The x term is 1.56x.  Take half its coefficient (0.78).
Square it (0.6084) and add it to both sides.

Add '0.6084' to each side of the equation.
1.56x + 0.6084 + x2 = -0.72 + 0.6084

Reorder the terms:
0.6084 + 1.56x + x2 = -0.72 + 0.6084

Combine like terms: -0.72 + 0.6084 = -0.1116
0.6084 + 1.56x + x2 = -0.1116

Factor a perfect square on the left side:
(x + 0.78)(x + 0.78) = -0.1116

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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