Q : 7       Using   a^2-b^2=(a+b)(a-b) , find.

              (iii) 153^2-147^2

Answers (1)

We know,

a^2-b^2=(a+b)(a-b)

Using this formula,

153^2-147^2 = (153 - 147)(153 +147)

=(6) (300)

= 1800

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