Using find

(i)


(ii)


(iii)


(iv)


(i) 512 - 492 =


Using Identity


Here a = 51, b = 49




(ii) (1.02)2 - (0.98) 2


Using Identity


Here a = 1.02, b = 0.98




(iii) (153)2 - (147)2


Using Identity


Here a = 153, b = 147




(iv) (12.1) 2 - (7.9) 2


Using Identity


Here a = 12.1, b = 7.9




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