(5x^2+4x-7)+(-5x^2-4x+7)=

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Solution for (5x^2+4x-7)+(-5x^2-4x+7)= equation: 


Simplifying
(5x2 + 4x + -7) + (-5x2 + -4x + 7) = 0

Reorder the terms:
(-7 + 4x + 5x2) + (-5x2 + -4x + 7) = 0

Remove parenthesis around (-7 + 4x + 5x2)
-7 + 4x + 5x2 + (-5x2 + -4x + 7) = 0

Reorder the terms:
-7 + 4x + 5x2 + (7 + -4x + -5x2) = 0

Remove parenthesis around (7 + -4x + -5x2)
-7 + 4x + 5x2 + 7 + -4x + -5x2 = 0

Reorder the terms:
-7 + 7 + 4x + -4x + 5x2 + -5x2 = 0

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

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

Combine like terms: 5x2 + -5x2 = 0
0 = 0

Solving
0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.

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