evaluate the following by using identity 3
(81)^2 -(19)^2
I will mark the brainliest ..
Answers
Answered by
38
hey your ans is here
_____
given
(81)2-(19)2
this is forming identity
a2-b2=(a+b)(a-b)
so
(81)2-(19)2=(81+19)(81-19)=(100)(62)
so
answer is 6200
_____
_____
given
(81)2-(19)2
this is forming identity
a2-b2=(a+b)(a-b)
so
(81)2-(19)2=(81+19)(81-19)=(100)(62)
so
answer is 6200
_____
RishitaSurve:
thank you for answering
okkkk
Answered by
40
Hyy...
Here's ur answer.....
The 3rd identity is
x2 - y2 = (x+y)(x-y)
So, (81)^2-(19)^2=(81+19)(81-19)
= 100*62
=6200.
Hope its correct..^_^
and plz mark as brainliest as u have said along with the question.:-) :-)
Here's ur answer.....
The 3rd identity is
x2 - y2 = (x+y)(x-y)
So, (81)^2-(19)^2=(81+19)(81-19)
= 100*62
=6200.
Hope its correct..^_^
and plz mark as brainliest as u have said along with the question.:-) :-)
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