Question

for a=3 and 6=4 verify the identities (a+b)2=a2+2ab+b2 and a2-b2= (a+b) (a-b) ​

Answer 1

a=3,b=4

(a+b)²=(3+4)²=49

a²+2ab+b²=9+2×3×4+16=49

a²-b²=3²-4²=9-16=-7

(a+b)(a-b)=(3+4)(3-4)=7×-1=-7