27. Find the square by using identity....... 98sq
28. The two adjacent sides of a rectangle are 5x² +4y? and x² + 2xy. Find the
perimeter.
3
29.Divide the sum of and by their difference .
30. Represent on number line.
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27).
Sol:
=102^2- 98^2
=(102+98)(102-98)
= 10404-9604
=800
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