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\left(x+1\right)\times 3x=2x\times 2x
Multiply both sides of the equation by 2.
\left(x+1\right)\times 3x=2x^{2}\times 2
Multiply x and x to get x^{2}.
\left(3x+3\right)x=2x^{2}\times 2
Use the distributive property to multiply x+1 by 3.
3x^{2}+3x=2x^{2}\times 2
Use the distributive property to multiply 3x+3 by x.
3x^{2}+3x=4x^{2}
Multiply 2 and 2 to get 4.
3x^{2}+3x-4x^{2}=0
Subtract 4x^{2} from both sides.
-x^{2}+3x=0
Combine 3x^{2} and -4x^{2} to get -x^{2}.
x\left(-x+3\right)=0
Factor out x.
x=0 x=3
To find equation solutions, solve x=0 and -x+3=0.
\left(x+1\right)\times 3x=2x\times 2x
Multiply both sides of the equation by 2.
\left(x+1\right)\times 3x=2x^{2}\times 2
Multiply x and x to get x^{2}.
\left(3x+3\right)x=2x^{2}\times 2
Use the distributive property to multiply x+1 by 3.
3x^{2}+3x=2x^{2}\times 2
Use the distributive property to multiply 3x+3 by x.
3x^{2}+3x=4x^{2}
Multiply 2 and 2 to get 4.
3x^{2}+3x-4x^{2}=0
Subtract 4x^{2} from both sides.
-x^{2}+3x=0
Combine 3x^{2} and -4x^{2} to get -x^{2}.
x=\frac{-3±\sqrt{3^{2}}}{2\left(-1\right)}
This equation is in standard form: ax^{2}+bx+c=0. Substitute -1 for a, 3 for b, and 0 for c in the quadratic formula, \frac{-b±\sqrt{b^{2}-4ac}}{2a}.
x=\frac{-3±3}{2\left(-1\right)}
Take the square root of 3^{2}.
x=\frac{-3±3}{-2}
Multiply 2 times -1.
x=\frac{0}{-2}
Now solve the equation x=\frac{-3±3}{-2} when ± is plus. Add -3 to 3.
x=0
Divide 0 by -2.
x=-\frac{6}{-2}
Now solve the equation x=\frac{-3±3}{-2} when ± is minus. Subtract 3 from -3.
x=3
Divide -6 by -2.
x=0 x=3
The equation is now solved.
\left(x+1\right)\times 3x=2x\times 2x
Multiply both sides of the equation by 2.
\left(x+1\right)\times 3x=2x^{2}\times 2
Multiply x and x to get x^{2}.
\left(3x+3\right)x=2x^{2}\times 2
Use the distributive property to multiply x+1 by 3.
3x^{2}+3x=2x^{2}\times 2
Use the distributive property to multiply 3x+3 by x.
3x^{2}+3x=4x^{2}
Multiply 2 and 2 to get 4.
3x^{2}+3x-4x^{2}=0
Subtract 4x^{2} from both sides.
-x^{2}+3x=0
Combine 3x^{2} and -4x^{2} to get -x^{2}.
\frac{-x^{2}+3x}{-1}=\frac{0}{-1}
Divide both sides by -1.
x^{2}+\frac{3}{-1}x=\frac{0}{-1}
Dividing by -1 undoes the multiplication by -1.
x^{2}-3x=\frac{0}{-1}
Divide 3 by -1.
x^{2}-3x=0
Divide 0 by -1.
x^{2}-3x+\left(-\frac{3}{2}\right)^{2}=\left(-\frac{3}{2}\right)^{2}
Divide -3, the coefficient of the x term, by 2 to get -\frac{3}{2}. Then add the square of -\frac{3}{2} to both sides of the equation. This step makes the left hand side of the equation a perfect square.
x^{2}-3x+\frac{9}{4}=\frac{9}{4}
Square -\frac{3}{2} by squaring both the numerator and the denominator of the fraction.
\left(x-\frac{3}{2}\right)^{2}=\frac{9}{4}
Factor x^{2}-3x+\frac{9}{4}. In general, when x^{2}+bx+c is a perfect square, it can always be factored as \left(x+\frac{b}{2}\right)^{2}.
\sqrt{\left(x-\frac{3}{2}\right)^{2}}=\sqrt{\frac{9}{4}}
Take the square root of both sides of the equation.
x-\frac{3}{2}=\frac{3}{2} x-\frac{3}{2}=-\frac{3}{2}
Simplify.
x=3 x=0
Add \frac{3}{2} to both sides of the equation.