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x\times 4+8xx=4+x\times 4+4xx
Variable x cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by x.
x\times 4+8x^{2}=4+x\times 4+4xx
Multiply x and x to get x^{2}.
x\times 4+8x^{2}=4+x\times 4+4x^{2}
Multiply x and x to get x^{2}.
x\times 4+8x^{2}-x\times 4=4+4x^{2}
Subtract x\times 4 from both sides.
8x^{2}=4+4x^{2}
Combine x\times 4 and -x\times 4 to get 0.
8x^{2}-4x^{2}=4
Subtract 4x^{2} from both sides.
4x^{2}=4
Combine 8x^{2} and -4x^{2} to get 4x^{2}.
x^{2}=\frac{4}{4}
Divide both sides by 4.
x^{2}=1
Divide 4 by 4 to get 1.
x=1 x=-1
Take the square root of both sides of the equation.
x\times 4+8xx=4+x\times 4+4xx
Variable x cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by x.
x\times 4+8x^{2}=4+x\times 4+4xx
Multiply x and x to get x^{2}.
x\times 4+8x^{2}=4+x\times 4+4x^{2}
Multiply x and x to get x^{2}.
x\times 4+8x^{2}-4=x\times 4+4x^{2}
Subtract 4 from both sides.
x\times 4+8x^{2}-4-x\times 4=4x^{2}
Subtract x\times 4 from both sides.
8x^{2}-4=4x^{2}
Combine x\times 4 and -x\times 4 to get 0.
8x^{2}-4-4x^{2}=0
Subtract 4x^{2} from both sides.
4x^{2}-4=0
Combine 8x^{2} and -4x^{2} to get 4x^{2}.
x=\frac{0±\sqrt{0^{2}-4\times 4\left(-4\right)}}{2\times 4}
This equation is in standard form: ax^{2}+bx+c=0. Substitute 4 for a, 0 for b, and -4 for c in the quadratic formula, \frac{-b±\sqrt{b^{2}-4ac}}{2a}.
x=\frac{0±\sqrt{-4\times 4\left(-4\right)}}{2\times 4}
Square 0.
x=\frac{0±\sqrt{-16\left(-4\right)}}{2\times 4}
Multiply -4 times 4.
x=\frac{0±\sqrt{64}}{2\times 4}
Multiply -16 times -4.
x=\frac{0±8}{2\times 4}
Take the square root of 64.
x=\frac{0±8}{8}
Multiply 2 times 4.
x=1
Now solve the equation x=\frac{0±8}{8} when ± is plus. Divide 8 by 8.
x=-1
Now solve the equation x=\frac{0±8}{8} when ± is minus. Divide -8 by 8.
x=1 x=-1
The equation is now solved.