67 × 73 by using identity
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28
(a+b)(a-b) =a square -b square
( 70+3)(70 -3) =70 square -3 square
=4900-9=4891
( 70+3)(70 -3) =70 square -3 square
=4900-9=4891
Answered by
25
(70-3)(70+3)
= (70×70) -(3×3)
=4900 -9
= 4891
= (70×70) -(3×3)
=4900 -9
= 4891
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