Question

I need help with this..I'm a beginner

Answer 1

the answer is in the attachment please check the attachment to get your answer

Answer 2

area 1=(x-1)(x+2)=x^2-x+2x-2==x^2+x-2;
area 2=x^2;
hence
          area 2-area 1=2;
         (x^2+x-2)-(x^2)=2
         x-2=2;(since,x^2-x^2)
         x=2+2;
         x=4