Evaluate
a) 109 × 91
b) 23.4 × 22.6
Tomboyish44:
Its okay if one of them is not written any one subdivision is more than enough
Answers
Answered by
3
(a)
109×91
=(100+9)×(100-9)
=100²-9²
=10000-81
=9919
(b) 23.4 ×22.6
=(23+0.4)×(23-0.4)
=23²-0.4²
=529 - 0.16
=528.84
By using the identity (a+b)(a-b) =a²-b²
Hope This is what you were Looking for...
Regards,
Leukonov.
109×91
=(100+9)×(100-9)
=100²-9²
=10000-81
=9919
(b) 23.4 ×22.6
=(23+0.4)×(23-0.4)
=23²-0.4²
=529 - 0.16
=528.84
By using the identity (a+b)(a-b) =a²-b²
Hope This is what you were Looking for...
Regards,
Leukonov.
Thnx
Anytime...
Answered by
1
a)
109 x 91
= (100+9) x (100-9)
= 10000 - 81
= 9919
b)
23.4 x 22.6
= (23 + 0.4) x (23 - 0.4)
= 529 - 0.16
= 528.84
109 x 91
= (100+9) x (100-9)
= 10000 - 81
= 9919
b)
23.4 x 22.6
= (23 + 0.4) x (23 - 0.4)
= 529 - 0.16
= 528.84
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