(9x^2+7y^2-3)-(7x^2+7y^2-7)=

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Solution for (9x^2+7y^2-3)-(7x^2+7y^2-7)= equation:


Simplifying
(9x2 + 7y2 + -3) + -1(7x2 + 7y2 + -7) = 0

Reorder the terms:
(-3 + 9x2 + 7y2) + -1(7x2 + 7y2 + -7) = 0

Remove parenthesis around (-3 + 9x2 + 7y2)
-3 + 9x2 + 7y2 + -1(7x2 + 7y2 + -7) = 0

Reorder the terms:
-3 + 9x2 + 7y2 + -1(-7 + 7x2 + 7y2) = 0
-3 + 9x2 + 7y2 + (-7 * -1 + 7x2 * -1 + 7y2 * -1) = 0
-3 + 9x2 + 7y2 + (7 + -7x2 + -7y2) = 0

Reorder the terms:
-3 + 7 + 9x2 + -7x2 + 7y2 + -7y2 = 0

Combine like terms: -3 + 7 = 4
4 + 9x2 + -7x2 + 7y2 + -7y2 = 0

Combine like terms: 9x2 + -7x2 = 2x2
4 + 2x2 + 7y2 + -7y2 = 0

Combine like terms: 7y2 + -7y2 = 0
4 + 2x2 + 0 = 0
4 + 2x2 = 0

Solving
4 + 2x2 = 0

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-4' to each side of the equation.
4 + -4 + 2x2 = 0 + -4

Combine like terms: 4 + -4 = 0
0 + 2x2 = 0 + -4
2x2 = 0 + -4

Combine like terms: 0 + -4 = -4
2x2 = -4

Divide each side by '2'.
x2 = -2

Simplifying
x2 = -2

Reorder the terms:
2 + x2 = -2 + 2

Combine like terms: -2 + 2 = 0
2 + x2 = 0

The solution to this equation could not be determined.

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