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Solve for K
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Solve for x (complex solution)
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\left(x+1\right)^{2}=K\left(-3x+2\right)
Multiply both sides of the equation by -3x+2.
x^{2}+2x+1=K\left(-3x+2\right)
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(x+1\right)^{2}.
x^{2}+2x+1=-3Kx+2K
Use the distributive property to multiply K by -3x+2.
-3Kx+2K=x^{2}+2x+1
Swap sides so that all variable terms are on the left hand side.
\left(-3x+2\right)K=x^{2}+2x+1
Combine all terms containing K.
\left(2-3x\right)K=x^{2}+2x+1
The equation is in standard form.
\frac{\left(2-3x\right)K}{2-3x}=\frac{\left(x+1\right)^{2}}{2-3x}
Divide both sides by 2-3x.
K=\frac{\left(x+1\right)^{2}}{2-3x}
Dividing by 2-3x undoes the multiplication by 2-3x.