Question

Prove that (✓5 + ✓3)(✓5 - ✓3) = 2. Use this to compute 2 ~✓ 5--✓-3
correct to two decimal places

Answer 1

Answer:

we know the identity (√a+√b)(√a-√b) = a-b

so,(√5+√3)(√5-√3) = 2

5-3 = 2

2 = 2

Hence ,proved.

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