3x^2+8x+7=-8x^2+5

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Solution for 3x^2+8x+7=-8x^2+5 equation:


Simplifying
3x2 + 8x + 7 = -8x2 + 5

Reorder the terms:
7 + 8x + 3x2 = -8x2 + 5

Reorder the terms:
7 + 8x + 3x2 = 5 + -8x2

Solving
7 + 8x + 3x2 = 5 + -8x2

Solving for variable 'x'.

Reorder the terms:
7 + -5 + 8x + 3x2 + 8x2 = 5 + -8x2 + -5 + 8x2

Combine like terms: 7 + -5 = 2
2 + 8x + 3x2 + 8x2 = 5 + -8x2 + -5 + 8x2

Combine like terms: 3x2 + 8x2 = 11x2
2 + 8x + 11x2 = 5 + -8x2 + -5 + 8x2

Reorder the terms:
2 + 8x + 11x2 = 5 + -5 + -8x2 + 8x2

Combine like terms: 5 + -5 = 0
2 + 8x + 11x2 = 0 + -8x2 + 8x2
2 + 8x + 11x2 = -8x2 + 8x2

Combine like terms: -8x2 + 8x2 = 0
2 + 8x + 11x2 = 0

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

Divide each side by '11'.
0.1818181818 + 0.7272727273x + x2 = 0

Move the constant term to the right:

Add '-0.1818181818' to each side of the equation.
0.1818181818 + 0.7272727273x + -0.1818181818 + x2 = 0 + -0.1818181818

Reorder the terms:
0.1818181818 + -0.1818181818 + 0.7272727273x + x2 = 0 + -0.1818181818

Combine like terms: 0.1818181818 + -0.1818181818 = 0.0000000000
0.0000000000 + 0.7272727273x + x2 = 0 + -0.1818181818
0.7272727273x + x2 = 0 + -0.1818181818

Combine like terms: 0 + -0.1818181818 = -0.1818181818
0.7272727273x + x2 = -0.1818181818

The x term is 0.7272727273x.  Take half its coefficient (0.3636363637).
Square it (0.1322314050) and add it to both sides.

Add '0.1322314050' to each side of the equation.
0.7272727273x + 0.1322314050 + x2 = -0.1818181818 + 0.1322314050

Reorder the terms:
0.1322314050 + 0.7272727273x + x2 = -0.1818181818 + 0.1322314050

Combine like terms: -0.1818181818 + 0.1322314050 = -0.0495867768
0.1322314050 + 0.7272727273x + x2 = -0.0495867768

Factor a perfect square on the left side:
(x + 0.3636363637)(x + 0.3636363637) = -0.0495867768

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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