1.

Using a2 − b2 = (a + b) (a − b), find(i) 512 − 492 (ii) (1.02)2 − (0.98)2 (iii) 1532 − 1472(iv) 12.12 − 7.92

Answer»

Using a2 − b2 = (a + b) (a − b), find



(i) 512 − 492 (ii) (1.02)2 − (0.98)2 (iii) 1532 − 1472



(iv) 12.12 − 7.92


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