(5x^2+2x-3)+(-2x^2+7)=

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


Simplifying
(5x2 + 2x + -3) + (-2x2 + 7) = 0

Reorder the terms:
(-3 + 2x + 5x2) + (-2x2 + 7) = 0

Remove parenthesis around (-3 + 2x + 5x2)
-3 + 2x + 5x2 + (-2x2 + 7) = 0

Reorder the terms:
-3 + 2x + 5x2 + (7 + -2x2) = 0

Remove parenthesis around (7 + -2x2)
-3 + 2x + 5x2 + 7 + -2x2 = 0

Reorder the terms:
-3 + 7 + 2x + 5x2 + -2x2 = 0

Combine like terms: -3 + 7 = 4
4 + 2x + 5x2 + -2x2 = 0

Combine like terms: 5x2 + -2x2 = 3x2
4 + 2x + 3x2 = 0

Solving
4 + 2x + 3x2 = 0

Solving for variable 'x'.

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

Divide each side by '3'.
1.333333333 + 0.6666666667x + x2 = 0

Move the constant term to the right:

Add '-1.333333333' to each side of the equation.
1.333333333 + 0.6666666667x + -1.333333333 + x2 = 0 + -1.333333333

Reorder the terms:
1.333333333 + -1.333333333 + 0.6666666667x + x2 = 0 + -1.333333333

Combine like terms: 1.333333333 + -1.333333333 = 0.000000000
0.000000000 + 0.6666666667x + x2 = 0 + -1.333333333
0.6666666667x + x2 = 0 + -1.333333333

Combine like terms: 0 + -1.333333333 = -1.333333333
0.6666666667x + x2 = -1.333333333

The x term is 0.6666666667x.  Take half its coefficient (0.3333333334).
Square it (0.1111111112) and add it to both sides.

Add '0.1111111112' to each side of the equation.
0.6666666667x + 0.1111111112 + x2 = -1.333333333 + 0.1111111112

Reorder the terms:
0.1111111112 + 0.6666666667x + x2 = -1.333333333 + 0.1111111112

Combine like terms: -1.333333333 + 0.1111111112 = -1.2222222218
0.1111111112 + 0.6666666667x + x2 = -1.2222222218

Factor a perfect square on the left side:
(x + 0.3333333334)(x + 0.3333333334) = -1.2222222218

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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