Q5 of 157 Page 22

Evaluate the following by using the identities:
96 × 104

∵ 96 × 104= (100 – 4) (100 + 4)

We know that

∵ (a² – b²) = (a – b) × (a + b)

∴ (100 – 4) (100 + 4) = (100)² – (4)²

⇒ (100 – 4) (100 + 4)= 10000 – 16 = 9984

Evaluate the following by using the identities:

998²

Evaluate the following by using the identities:

53 × 47

Evaluate the following by using the identities:

28 × 32

Answer: 896

Evaluate the following by using the identities:

81 × 79

Questions · 157

1. Algebra

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Evaluate the following by using the identities:96 × 104