Q1. estimate (720+280)(720-280) using algebric identity.
Q2. Estimate correct to 2 significant figures, the value of 30.02*19.99-78.23
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1. (a+b)(a-b)
=a^2-b^2
now,
[720+280)(720-280)
(720)^2-(280)^2
=518400- 78400
=540000....
it is correct
=a^2-b^2
now,
[720+280)(720-280)
(720)^2-(280)^2
=518400- 78400
=540000....
it is correct
bhargavkumar1:
now it is correct
please mark as brainliest
first pls solve q2
ok wait
hey q2 is correct...
please check your questions properly
it iw c9rrect
whatt
correct
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