(0.7a - 0.9b)^2solve it step by step right answer will be mark brainli

1.	(0.7a - 0.9b)^2solve it step by step right answer will be mark brainliest
Answer» 4 ( 0.7 - 0.9 )^2 Here, a = 0.7 and B = 0.9 = (0.7)^2 - (2 × 0.7 × 0.9) + (0.9)^2 { By the identity : (a-b)^2 = a^2 - 2ab + b^2 }. = 0.49 - 1.26 + 0.81 { Solving each of them separately }. = 0.04.

(0.7a - 0.9b)^2solve it step by step right answer will be mark brainliest

Answer»

( 0.7 - 0.9 )^2

Here, a = 0.7 and B = 0.9

= (0.7)^2 - (2 × 0.7 × 0.9) + (0.9)^2

{ By the identity : (a-b)^2 = a^2 - 2ab + b^2 }.

= 0.49 - 1.26 + 0.81

{ Solving each of them separately }.

= 0.04.