using identity 9.8×9.6
weld:
95.08
Answers
Answered by
32
☆Hey Mate☆
9.8 × 9.6 can also be written as
( 9 + 0.8 ) ( 9 + 0.6 )
Similar to ( x + a ) ( x + b )
= x ^2 + ( a+b )x + ab
= 9^2 + ( 0.8 + 0.6)9 + 0.8 × 0.6
= 81 + ( 1.4 × 9 ) + 0.48
= 81 + 12.6 + 0.48
= 94.08
Hope u like it! ☺✌
9.8 × 9.6 can also be written as
( 9 + 0.8 ) ( 9 + 0.6 )
Similar to ( x + a ) ( x + b )
= x ^2 + ( a+b )x + ab
= 9^2 + ( 0.8 + 0.6)9 + 0.8 × 0.6
= 81 + ( 1.4 × 9 ) + 0.48
= 81 + 12.6 + 0.48
= 94.08
Hope u like it! ☺✌
shuchi , its 9.7 - 0.1 , not 0.7-0.1 , kindly edit it :-)
Thanks for relling friend
telling
I had written it by mistake but I was taking 9.7 - 0.1 only
:-)
Bye
Answered by
12
Hi there !!
Given,
to solve ,
9.8 × 9.6 using algebraic identities
in this case,
the identity (x + a)(x + b) = x² + x(a + b) + ab will be used
Therefore,
(9 + 0.8)( 9 + 0.6)
= (9)² + 9(0.8+0.6) + 0.8×0.6
= 81 + 12.6 + 0.48
= 94.08
Thus,
9.8 × 9.6 = 94.08
It can also be solved using the identity ,
(a - b)(a + b) where,
a = 9.7
b = 0.1
So,
(9.7 + 0.1)(9.7 - 0.1)
= (9.7)² - (0.1)²
= 94.08
Given,
to solve ,
9.8 × 9.6 using algebraic identities
in this case,
the identity (x + a)(x + b) = x² + x(a + b) + ab will be used
Therefore,
(9 + 0.8)( 9 + 0.6)
= (9)² + 9(0.8+0.6) + 0.8×0.6
= 81 + 12.6 + 0.48
= 94.08
Thus,
9.8 × 9.6 = 94.08
It can also be solved using the identity ,
(a - b)(a + b) where,
a = 9.7
b = 0.1
So,
(9.7 + 0.1)(9.7 - 0.1)
= (9.7)² - (0.1)²
= 94.08
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