Solve for y
y=8x\left(x+2\right)
Solve for x (complex solution)
x=-\frac{\sqrt{2y+16}}{4}-1
x=\frac{\sqrt{2y+16}}{4}-1
Solve for x
x=-\frac{\sqrt{2y+16}}{4}-1
x=\frac{\sqrt{2y+16}}{4}-1\text{, }y\geq -8
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y=8\left(x^{2}+2x+1\right)-8
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(x+1\right)^{2}.
y=8x^{2}+16x+8-8
Use the distributive property to multiply 8 by x^{2}+2x+1.
y=8x^{2}+16x
Subtract 8 from 8 to get 0.
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