Question

evaluate 8.1 using identity -1

Answer 1

formulae-a^2+2ab+b^2
(8+0.1)
(8^2+2×8×0.1+0.1^2)
64+1.6+0.2
64+1.8
65.8

Answer 2

Answer:

65.61

Step-by-step explanation:

Formula=a^2+2ab+b^2

Now, taking a=8 and b=0.1(8+0.1)

So,(8)^2 +2x8x0.1+(0.1)^2

=64+1.6+0.01=65.61