Question

8.5×9.5 Evaluate these using identity

Answer 1

Ok by using algebric identity we get -
{(100 - 15 )(100-5)}/100

{10000-500-1500+75}/100

8075/100

80.75
(Ans)

Hope it helps

Answer 2

Hello Dear!!!

Here's your answer...

Given,

8.5 × 9.5

8.5 can be written as 9-0.5

9.5 can be written as 9+0.5

8.5 × 9.5

(9-0.5) × (9+0.5)

It is in the form of (a+b)(a-b)

=(a) ^2 - (b)^2

(9)^2 - (0.5)^2

81-0.25

80.75

______________________


Hope this helps you....