Question

4. The root of the equation :
(x + 3) (x + 7) /(x-5) (x+3)=1 is​

Answer 1

(x+3)(x+7)/(x-5)(x+3)=1

x(x+7)+3(x+7)/x(x+3)-5(x+3)=1

x^2+7x+3x+21/x^2+3x-5x-15=1

x^2+10x+21/x^2-2x-15=1