5x(5x)+21x+22=0

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Solution for 5x(5x)+21x+22=0 equation:


Simplifying
5x(5x) + 21x + 22 = 0

Remove parenthesis around (5x)
5x * 5x + 21x + 22 = 0

Reorder the terms for easier multiplication:
5 * 5x * x + 21x + 22 = 0

Multiply 5 * 5
25x * x + 21x + 22 = 0

Multiply x * x
25x2 + 21x + 22 = 0

Reorder the terms:
22 + 21x + 25x2 = 0

Solving
22 + 21x + 25x2 = 0

Solving for variable 'x'.

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

Divide each side by '25'.
0.88 + 0.84x + x2 = 0

Move the constant term to the right:

Add '-0.88' to each side of the equation.
0.88 + 0.84x + -0.88 + x2 = 0 + -0.88

Reorder the terms:
0.88 + -0.88 + 0.84x + x2 = 0 + -0.88

Combine like terms: 0.88 + -0.88 = 0.00
0.00 + 0.84x + x2 = 0 + -0.88
0.84x + x2 = 0 + -0.88

Combine like terms: 0 + -0.88 = -0.88
0.84x + x2 = -0.88

The x term is 0.84x.  Take half its coefficient (0.42).
Square it (0.1764) and add it to both sides.

Add '0.1764' to each side of the equation.
0.84x + 0.1764 + x2 = -0.88 + 0.1764

Reorder the terms:
0.1764 + 0.84x + x2 = -0.88 + 0.1764

Combine like terms: -0.88 + 0.1764 = -0.7036
0.1764 + 0.84x + x2 = -0.7036

Factor a perfect square on the left side:
(x + 0.42)(x + 0.42) = -0.7036

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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