Question

Use the Identity (x + a) (x + b) = x² + (a + b)x + ab to find the following:

95 × 103

Answer 1

95 × 103
= (100 - 5) × (100 + 3)
= 100² + (-5 + 3) × 100 + (-5) × 3
= 10000 - 200 - 15
= 9785.