vi roman number pls solve
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a+b(a-b)=a²-ab+ab-b²
then cancellation
(a+b)(a-b)=a²-b²
here values are 89,79
89²-79²=(89+79)(89-79)
=168(10)
=1680
then cancellation
(a+b)(a-b)=a²-b²
here values are 89,79
89²-79²=(89+79)(89-79)
=168(10)
=1680
bindhuajith571:
answer is correct
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