(8x^2+2x+7)+(-4x^2+6x+2)=

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Solution for (8x^2+2x+7)+(-4x^2+6x+2)= equation:


Simplifying
(8x2 + 2x + 7) + (-4x2 + 6x + 2) = 0

Reorder the terms:
(7 + 2x + 8x2) + (-4x2 + 6x + 2) = 0

Remove parenthesis around (7 + 2x + 8x2)
7 + 2x + 8x2 + (-4x2 + 6x + 2) = 0

Reorder the terms:
7 + 2x + 8x2 + (2 + 6x + -4x2) = 0

Remove parenthesis around (2 + 6x + -4x2)
7 + 2x + 8x2 + 2 + 6x + -4x2 = 0

Reorder the terms:
7 + 2 + 2x + 6x + 8x2 + -4x2 = 0

Combine like terms: 7 + 2 = 9
9 + 2x + 6x + 8x2 + -4x2 = 0

Combine like terms: 2x + 6x = 8x
9 + 8x + 8x2 + -4x2 = 0

Combine like terms: 8x2 + -4x2 = 4x2
9 + 8x + 4x2 = 0

Solving
9 + 8x + 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'.
2.25 + 2x + x2 = 0

Move the constant term to the right:

Add '-2.25' to each side of the equation.
2.25 + 2x + -2.25 + x2 = 0 + -2.25

Reorder the terms:
2.25 + -2.25 + 2x + x2 = 0 + -2.25

Combine like terms: 2.25 + -2.25 = 0.00
0.00 + 2x + x2 = 0 + -2.25
2x + x2 = 0 + -2.25

Combine like terms: 0 + -2.25 = -2.25
2x + x2 = -2.25

The x term is 2x.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x + 1 + x2 = -2.25 + 1

Reorder the terms:
1 + 2x + x2 = -2.25 + 1

Combine like terms: -2.25 + 1 = -1.25
1 + 2x + x2 = -1.25

Factor a perfect square on the left side:
(x + 1)(x + 1) = -1.25

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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