If a+b=10 and a-b=9 then find a2-b2 iam 9th standard maths
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a+b=10
a-b=9
a^2-b^2=(a+b)(a-b)
=10×9=90
:. the answer is 90
I hope it helps you....
a-b=9
a^2-b^2=(a+b)(a-b)
=10×9=90
:. the answer is 90
I hope it helps you....
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