Question

(a+1)
${(a + 1)}^{2} - {(b - 1)}^{2}$
tell me answer​

Answer 1

Given:

(A+B)2=A2+B2

⇒(A+B)(A+B)=A2+B2

⇒A(A+B)+B(A+B)=A2+B2

⇒A2+AB+BA+B2=A2+B2

⇒AB+BA=O

So,

[1−12−1][a1b−1]+[a1b−1][1−12−1]=[0000]

⇒[a−b22a−b3]+[a+2−a−1b−2−b+1]=[0000]

⇒[2a−b+2−a+12a−2−b+4]=[0000]

⇒2a−b+2=0,−a+1=0,2a−2=0,−b+4=0