Question

evaluate. b2-9(b-1)2,if b= 1.1

Answer 1

Given b = 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

Answer 2

givenb =1.1

(b) 2-9 ( b-1)=

(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

1.12 is answer