SOLVED EXAMPLES Question 1: Find out the value of 5 2 – 3 2 Solution: Using the formula a 2 – b 2 = (a – b)(a + b) where a = 5 and b = 3 (a – b)(a + b) = (5 – 3)(5 + 3) = 2 $\times$ 8 = 16 Question 2: 4 3 $\times$ 4 2 = ? Solution: Using the exponential formula (a m )(a n ) = a m+n where a = 4 4 3 $\times$ 4 2 = 4 3+2 = 4 5 = 1024