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4x^{2}-12x+9=\left(3x-2\right)^{2}
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(2x-3\right)^{2}.
4x^{2}-12x+9=9x^{2}-12x+4
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(3x-2\right)^{2}.
4x^{2}-12x+9-9x^{2}=-12x+4
Subtract 9x^{2} from both sides.
-5x^{2}-12x+9=-12x+4
Combine 4x^{2} and -9x^{2} to get -5x^{2}.
-5x^{2}-12x+9+12x=4
Add 12x to both sides.
-5x^{2}+9=4
Combine -12x and 12x to get 0.
-5x^{2}=4-9
Subtract 9 from both sides.
-5x^{2}=-5
Subtract 9 from 4 to get -5.
x^{2}=\frac{-5}{-5}
Divide both sides by -5.
x^{2}=1
Divide -5 by -5 to get 1.
x=1 x=-1
Take the square root of both sides of the equation.
4x^{2}-12x+9=\left(3x-2\right)^{2}
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(2x-3\right)^{2}.
4x^{2}-12x+9=9x^{2}-12x+4
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(3x-2\right)^{2}.
4x^{2}-12x+9-9x^{2}=-12x+4
Subtract 9x^{2} from both sides.
-5x^{2}-12x+9=-12x+4
Combine 4x^{2} and -9x^{2} to get -5x^{2}.
-5x^{2}-12x+9+12x=4
Add 12x to both sides.
-5x^{2}+9=4
Combine -12x and 12x to get 0.
-5x^{2}+9-4=0
Subtract 4 from both sides.
-5x^{2}+5=0
Subtract 4 from 9 to get 5.
x=\frac{0±\sqrt{0^{2}-4\left(-5\right)\times 5}}{2\left(-5\right)}
This equation is in standard form: ax^{2}+bx+c=0. Substitute -5 for a, 0 for b, and 5 for c in the quadratic formula, \frac{-b±\sqrt{b^{2}-4ac}}{2a}.
x=\frac{0±\sqrt{-4\left(-5\right)\times 5}}{2\left(-5\right)}
Square 0.
x=\frac{0±\sqrt{20\times 5}}{2\left(-5\right)}
Multiply -4 times -5.
x=\frac{0±\sqrt{100}}{2\left(-5\right)}
Multiply 20 times 5.
x=\frac{0±10}{2\left(-5\right)}
Take the square root of 100.
x=\frac{0±10}{-10}
Multiply 2 times -5.
x=-1
Now solve the equation x=\frac{0±10}{-10} when ± is plus. Divide 10 by -10.
x=1
Now solve the equation x=\frac{0±10}{-10} when ± is minus. Divide -10 by -10.
x=-1 x=1
The equation is now solved.