Solve for y
y=4x\left(x-2\right)
Solve for x (complex solution)
x=-\frac{\sqrt{y+4}}{2}+1
x=\frac{\sqrt{y+4}}{2}+1
Solve for x
x=-\frac{\sqrt{y+4}}{2}+1
x=\frac{\sqrt{y+4}}{2}+1\text{, }y\geq -4
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y=4\left(x^{2}-2x+1\right)-4
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(x-1\right)^{2}.
y=4x^{2}-8x+4-4
Use the distributive property to multiply 4 by x^{2}-2x+1.
y=4x^{2}-8x
Subtract 4 from 4 to get 0.
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