Solve for y
y=\frac{\left(x+2\right)^{2}+24}{8}
Solve for x (complex solution)
x=-2\sqrt{2y-6}-2
x=2\sqrt{2y-6}-2
Solve for x
x=-2\sqrt{2y-6}-2
x=2\sqrt{2y-6}-2\text{, }y\geq 3
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x^{2}+4x+4=8\left(y-3\right)
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(x+2\right)^{2}.
x^{2}+4x+4=8y-24
Use the distributive property to multiply 8 by y-3.
8y-24=x^{2}+4x+4
Swap sides so that all variable terms are on the left hand side.
8y=x^{2}+4x+4+24
Add 24 to both sides.
8y=x^{2}+4x+28
Add 4 and 24 to get 28.
\frac{8y}{8}=\frac{x^{2}+4x+28}{8}
Divide both sides by 8.
y=\frac{x^{2}+4x+28}{8}
Dividing by 8 undoes the multiplication by 8.
y=\frac{x^{2}}{8}+\frac{x}{2}+\frac{7}{2}
Divide x^{2}+4x+28 by 8.
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