Question

(x+1)(x+2)/(x+1)(x-2)=1​

Answer 1

(x+1)(x+2)/(x+1)(x-2)=1

(x²+2x+1x+2)/(x²-2x+x-2)=1

(x²+3x+2)/(x²-x-2)=1

x²+3x+2=x²-x-2

x²=x²-x-2-3x-2

x²-x²=-4x-4

0=-4x-4

4x=-4

x=-1