use the rulesof the special products to find the value of 54square-50square
542 - 502 = (54 + 50) (54 - 50) [using, a2 - b2 = (a + b) (a - b) ]
= 104 × 4 = 416
Which rule is used to prove {10 × (5 + 2)} = {(10 × 5) + (10 × 2)} ? Using the same rule find the value of 99×101. [4 MARKS]