3=5x^2-7x+8-16x^2-25

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Solution for 3=5x^2-7x+8-16x^2-25 equation:


Simplifying
3 = 5x2 + -7x + 8 + -16x2 + -25

Reorder the terms:
3 = 8 + -25 + -7x + 5x2 + -16x2

Combine like terms: 8 + -25 = -17
3 = -17 + -7x + 5x2 + -16x2

Combine like terms: 5x2 + -16x2 = -11x2
3 = -17 + -7x + -11x2

Solving
3 = -17 + -7x + -11x2

Solving for variable 'x'.

Combine like terms: 3 + 17 = 20
20 + 7x + 11x2 = -17 + -7x + -11x2 + 17 + 7x + 11x2

Reorder the terms:
20 + 7x + 11x2 = -17 + 17 + -7x + 7x + -11x2 + 11x2

Combine like terms: -17 + 17 = 0
20 + 7x + 11x2 = 0 + -7x + 7x + -11x2 + 11x2
20 + 7x + 11x2 = -7x + 7x + -11x2 + 11x2

Combine like terms: -7x + 7x = 0
20 + 7x + 11x2 = 0 + -11x2 + 11x2
20 + 7x + 11x2 = -11x2 + 11x2

Combine like terms: -11x2 + 11x2 = 0
20 + 7x + 11x2 = 0

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

Divide each side by '11'.
1.818181818 + 0.6363636364x + x2 = 0

Move the constant term to the right:

Add '-1.818181818' to each side of the equation.
1.818181818 + 0.6363636364x + -1.818181818 + x2 = 0 + -1.818181818

Reorder the terms:
1.818181818 + -1.818181818 + 0.6363636364x + x2 = 0 + -1.818181818

Combine like terms: 1.818181818 + -1.818181818 = 0.000000000
0.000000000 + 0.6363636364x + x2 = 0 + -1.818181818
0.6363636364x + x2 = 0 + -1.818181818

Combine like terms: 0 + -1.818181818 = -1.818181818
0.6363636364x + x2 = -1.818181818

The x term is 0.6363636364x.  Take half its coefficient (0.3181818182).
Square it (0.1012396694) and add it to both sides.

Add '0.1012396694' to each side of the equation.
0.6363636364x + 0.1012396694 + x2 = -1.818181818 + 0.1012396694

Reorder the terms:
0.1012396694 + 0.6363636364x + x2 = -1.818181818 + 0.1012396694

Combine like terms: -1.818181818 + 0.1012396694 = -1.7169421486
0.1012396694 + 0.6363636364x + x2 = -1.7169421486

Factor a perfect square on the left side:
(x + 0.3181818182)(x + 0.3181818182) = -1.7169421486

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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