(8x^2+6x+7)+(8x^2+9x)=

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Solution for (8x^2+6x+7)+(8x^2+9x)= equation:


Simplifying
(8x2 + 6x + 7) + (8x2 + 9x) = 0

Reorder the terms:
(7 + 6x + 8x2) + (8x2 + 9x) = 0

Remove parenthesis around (7 + 6x + 8x2)
7 + 6x + 8x2 + (8x2 + 9x) = 0

Reorder the terms:
7 + 6x + 8x2 + (9x + 8x2) = 0

Remove parenthesis around (9x + 8x2)
7 + 6x + 8x2 + 9x + 8x2 = 0

Reorder the terms:
7 + 6x + 9x + 8x2 + 8x2 = 0

Combine like terms: 6x + 9x = 15x
7 + 15x + 8x2 + 8x2 = 0

Combine like terms: 8x2 + 8x2 = 16x2
7 + 15x + 16x2 = 0

Solving
7 + 15x + 16x2 = 0

Solving for variable 'x'.

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

Divide each side by '16'.
0.4375 + 0.9375x + x2 = 0

Move the constant term to the right:

Add '-0.4375' to each side of the equation.
0.4375 + 0.9375x + -0.4375 + x2 = 0 + -0.4375

Reorder the terms:
0.4375 + -0.4375 + 0.9375x + x2 = 0 + -0.4375

Combine like terms: 0.4375 + -0.4375 = 0.0000
0.0000 + 0.9375x + x2 = 0 + -0.4375
0.9375x + x2 = 0 + -0.4375

Combine like terms: 0 + -0.4375 = -0.4375
0.9375x + x2 = -0.4375

The x term is 0.9375x.  Take half its coefficient (0.46875).
Square it (0.2197265625) and add it to both sides.

Add '0.2197265625' to each side of the equation.
0.9375x + 0.2197265625 + x2 = -0.4375 + 0.2197265625

Reorder the terms:
0.2197265625 + 0.9375x + x2 = -0.4375 + 0.2197265625

Combine like terms: -0.4375 + 0.2197265625 = -0.2177734375
0.2197265625 + 0.9375x + x2 = -0.2177734375

Factor a perfect square on the left side:
(x + 0.46875)(x + 0.46875) = -0.2177734375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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