Q. 175.0( 8 Votes )

Simplify:

Answer :

(i)


(178)2 – (22)2


Using formula:


(a – b) (a + b) = a2 – b2, we get


= (178 + 22) (178 – 22)


= 200 × 156


= 31200


(iii)


Using formula:


(a – b) (a + b) = a2 – b2, we get




= 300


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