5x^2+20x+100=8

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Solution for 5x^2+20x+100=8 equation:


Simplifying
5x2 + 20x + 100 = 8

Reorder the terms:
100 + 20x + 5x2 = 8

Solving
100 + 20x + 5x2 = 8

Solving for variable 'x'.

Reorder the terms:
100 + -8 + 20x + 5x2 = 8 + -8

Combine like terms: 100 + -8 = 92
92 + 20x + 5x2 = 8 + -8

Combine like terms: 8 + -8 = 0
92 + 20x + 5x2 = 0

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

Divide each side by '5'.
18.4 + 4x + x2 = 0

Move the constant term to the right:

Add '-18.4' to each side of the equation.
18.4 + 4x + -18.4 + x2 = 0 + -18.4

Reorder the terms:
18.4 + -18.4 + 4x + x2 = 0 + -18.4

Combine like terms: 18.4 + -18.4 = 0.0
0.0 + 4x + x2 = 0 + -18.4
4x + x2 = 0 + -18.4

Combine like terms: 0 + -18.4 = -18.4
4x + x2 = -18.4

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 = -18.4 + 4

Reorder the terms:
4 + 4x + x2 = -18.4 + 4

Combine like terms: -18.4 + 4 = -14.4
4 + 4x + x2 = -14.4

Factor a perfect square on the left side:
(x + 2)(x + 2) = -14.4

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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