Question

evaluate the following using suitable identity 9.8×10.2​

Answer 1

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$<b><marquee>Your QUESTION is ~~~> ⤵⤵⤵⤵</marquee></b>$

Evaluate the following using suitable identity 9.8×10.2

$<b><marquee>The ANSWER is ~~~> ⤵⤵⤵⤵</marquee></b>$

= 9.8 * 10.2

= ( 10 - 0.2 ) * ( 10 + 0.2 )

We know,

( x + a ) ( x + b ) = x² + ( a + b )x + ab

Here,

x = 10

a = - 0.2

b = + 0.2

= (10)² + ( -0.2 + 0.2 )10 + (0.2)*(-0.2)

= 100 + (0) * 10 - 0.04

= 100 - 0.04 + 0

= 99.96

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Answer 2

Step-by-step explanation:

Identity:) (x+a)(x+b)=x²+(a+b)x+ab