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\left(x-1\right)\left(3x-2\right)=\left(x-1\right)\left(x+1\right)\times 4-\left(x+1\right)\left(x+2\right)
Variable x cannot be equal to any of the values -1,1 since division by zero is not defined. Multiply both sides of the equation by \left(x-1\right)\left(x+1\right), the least common multiple of x+1,x-1.
3x^{2}-5x+2=\left(x-1\right)\left(x+1\right)\times 4-\left(x+1\right)\left(x+2\right)
Use the distributive property to multiply x-1 by 3x-2 and combine like terms.
3x^{2}-5x+2=\left(x^{2}-1\right)\times 4-\left(x+1\right)\left(x+2\right)
Use the distributive property to multiply x-1 by x+1 and combine like terms.
3x^{2}-5x+2=4x^{2}-4-\left(x+1\right)\left(x+2\right)
Use the distributive property to multiply x^{2}-1 by 4.
3x^{2}-5x+2=4x^{2}-4-\left(x^{2}+3x+2\right)
Use the distributive property to multiply x+1 by x+2 and combine like terms.
3x^{2}-5x+2=4x^{2}-4-x^{2}-3x-2
To find the opposite of x^{2}+3x+2, find the opposite of each term.
3x^{2}-5x+2=3x^{2}-4-3x-2
Combine 4x^{2} and -x^{2} to get 3x^{2}.
3x^{2}-5x+2=3x^{2}-6-3x
Subtract 2 from -4 to get -6.
3x^{2}-5x+2-3x^{2}=-6-3x
Subtract 3x^{2} from both sides.
-5x+2=-6-3x
Combine 3x^{2} and -3x^{2} to get 0.
-5x+2+3x=-6
Add 3x to both sides.
-2x+2=-6
Combine -5x and 3x to get -2x.
-2x=-6-2
Subtract 2 from both sides.
-2x=-8
Subtract 2 from -6 to get -8.
x=\frac{-8}{-2}
Divide both sides by -2.
x=4
Divide -8 by -2 to get 4.