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\left(x-2\right)\left(x+2\right)=x^{2}-\left(x+2\right)x+\left(x-2\right)\times 2
Variable x cannot be equal to any of the values -2,2 since division by zero is not defined. Multiply both sides of the equation by \left(x-2\right)\left(x+2\right), the least common multiple of x^{2}-4,x-2,x+2.
x^{2}-4=x^{2}-\left(x+2\right)x+\left(x-2\right)\times 2
Consider \left(x-2\right)\left(x+2\right). Multiplication can be transformed into difference of squares using the rule: \left(a-b\right)\left(a+b\right)=a^{2}-b^{2}. Square 2.
x^{2}-4=x^{2}-\left(x^{2}+2x\right)+\left(x-2\right)\times 2
Use the distributive property to multiply x+2 by x.
x^{2}-4=x^{2}-x^{2}-2x+\left(x-2\right)\times 2
To find the opposite of x^{2}+2x, find the opposite of each term.
x^{2}-4=-2x+\left(x-2\right)\times 2
Combine x^{2} and -x^{2} to get 0.
x^{2}-4=-2x+2x-4
Use the distributive property to multiply x-2 by 2.
x^{2}-4=-4
Combine -2x and 2x to get 0.
x^{2}=-4+4
Add 4 to both sides.
x^{2}=0
Add -4 and 4 to get 0.
x=0 x=0
Take the square root of both sides of the equation.
x=0
The equation is now solved. Solutions are the same.
\left(x-2\right)\left(x+2\right)=x^{2}-\left(x+2\right)x+\left(x-2\right)\times 2
Variable x cannot be equal to any of the values -2,2 since division by zero is not defined. Multiply both sides of the equation by \left(x-2\right)\left(x+2\right), the least common multiple of x^{2}-4,x-2,x+2.
x^{2}-4=x^{2}-\left(x+2\right)x+\left(x-2\right)\times 2
Consider \left(x-2\right)\left(x+2\right). Multiplication can be transformed into difference of squares using the rule: \left(a-b\right)\left(a+b\right)=a^{2}-b^{2}. Square 2.
x^{2}-4=x^{2}-\left(x^{2}+2x\right)+\left(x-2\right)\times 2
Use the distributive property to multiply x+2 by x.
x^{2}-4=x^{2}-x^{2}-2x+\left(x-2\right)\times 2
To find the opposite of x^{2}+2x, find the opposite of each term.
x^{2}-4=-2x+\left(x-2\right)\times 2
Combine x^{2} and -x^{2} to get 0.
x^{2}-4=-2x+2x-4
Use the distributive property to multiply x-2 by 2.
x^{2}-4=-4
Combine -2x and 2x to get 0.
x^{2}-4+4=0
Add 4 to both sides.
x^{2}=0
Add -4 and 4 to get 0.
x=\frac{0±\sqrt{0^{2}}}{2}
This equation is in standard form: ax^{2}+bx+c=0. Substitute 1 for a, 0 for b, and 0 for c in the quadratic formula, \frac{-b±\sqrt{b^{2}-4ac}}{2a}.
x=\frac{0±0}{2}
Take the square root of 0^{2}.
x=0
Divide 0 by 2.