Question

What is the value of(√5-1) (√5+1)

Answer 1

Answer:

-8.94427191 Your Answer

Answer 2

by using (a+b)(a-b)=a²-b²

(✓5²)-(1²) {doing square}

5-1=4

so the value of (✓5+1)(✓5-1) is 4

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