Question

$put \: the \: value \: b = 1.1 = \frac{11}{10}$

please give answer by solving because i know the answer but not know how to solve plssssssssssssssss ​

Answer 1

Substitute the value of b i.e, 1.1

=b²-9(b-1)²

=(1.1)²-9(1.1-1)²

= 1.21-9(0.1)²

= 1.21-9(0.01)

= 1.21-0.09

= 1.12

PLEASE MARK THIS ANSWER AS BRAINLIEST

Answer 2

Answer:

Given-

${b}^{2} - 9 {(b - 1)}^{2}$

Explanation

${(b)}^{2} - {3(b - 1)} ^{2} \\( b + 3b - 3)(b - 3b + 3) \\ (4b - 3)( - 2b + 3) \\ (4.4 - 3)( - 2.2 + 3) \\ (1.4)( - 1.2) \\ - (1.68) \\ - 1.68$