Question

2)Evaluate (11.5)² using Identity I​

Answer 1

Answer:

(10+1.5)^2=100+2.25+2*10*1.5

=100+2.25+30=132.25

Answer 2

Answer:

Identity I is ( a + b )^2 = a^2 + b^2 + 2ab

( 11.5 )^2

= ( 11 + 0.5 )^2

= 11^2 + 0.5^2 + 2×11×0.5

= 121 + 0.25 + 11

= 132.25