Question

Using a special expansion expand (10.9)^2 pls do fast guys..

Answer 1

Answer:

118.81

Step-by-step explanation:

(10.9)²

can be written as,

(10+0.9)²

by (x+y)² we have,

10²+0.9²+2(10)(0.9)

=100+0.81+18

=118.81

Answer 2

Answer:

118.81

Step-by-step explanation:

(10.9)

can be solved as,

by the formula a+b² = a² + b² + 2ab

10² + 0.9² + 2(10 * 0.9)

= 100 + 0.81 + 18

= 118.80