2x(2x+3)+(x+8)=

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Solution for 2x(2x+3)+(x+8)= equation:


Simplifying
2x(2x + 3) + (x + 8) = 0

Reorder the terms:
2x(3 + 2x) + (x + 8) = 0
(3 * 2x + 2x * 2x) + (x + 8) = 0
(6x + 4x2) + (x + 8) = 0

Reorder the terms:
6x + 4x2 + (8 + x) = 0

Remove parenthesis around (8 + x)
6x + 4x2 + 8 + x = 0

Reorder the terms:
8 + 6x + x + 4x2 = 0

Combine like terms: 6x + x = 7x
8 + 7x + 4x2 = 0

Solving
8 + 7x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
2 + 1.75x + x2 = 0

Move the constant term to the right:

Add '-2' to each side of the equation.
2 + 1.75x + -2 + x2 = 0 + -2

Reorder the terms:
2 + -2 + 1.75x + x2 = 0 + -2

Combine like terms: 2 + -2 = 0
0 + 1.75x + x2 = 0 + -2
1.75x + x2 = 0 + -2

Combine like terms: 0 + -2 = -2
1.75x + x2 = -2

The x term is 1.75x.  Take half its coefficient (0.875).
Square it (0.765625) and add it to both sides.

Add '0.765625' to each side of the equation.
1.75x + 0.765625 + x2 = -2 + 0.765625

Reorder the terms:
0.765625 + 1.75x + x2 = -2 + 0.765625

Combine like terms: -2 + 0.765625 = -1.234375
0.765625 + 1.75x + x2 = -1.234375

Factor a perfect square on the left side:
(x + 0.875)(x + 0.875) = -1.234375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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