1.

( 7 + 3 ) ( 7 − 3 ) = ( 5 + 4 ) ( 5 − 4 )

Answer»

L.H.S. = (7+3)(7-3) = 10 x 4 = 40

R.H.S. = (5+4)(5-4) = 9 x 1 = 9 ≠ 40

Hence, L.H.S. ≠ R.H.S.

Thus, (7+3)(7-3) ≠ (5+4)(5-4).



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