Question

29 square usuing formula (a-b)=a2+b2-2ab

Answer 1

29=30-1
a=30
b=1
29^2=30^2+1^2-2(30) (1)
=900+1-60
=841
hope it helps you

Answer 2

the [a-b]… the a= 30 and b =1
( 30-1) = 30^+1^-2×30×1
= 900 + 1 -60
= 841