Question

Exercise 1.4
1. Simplify the following:
√45 -3√20 + 4√5

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Answer 1

Answer:

√45-3√20+4√5

= √(9×5)-3√(4×5)+4√5

= 3√5-3×2√5+4√5

= 3√5-6√5+4√5

= 3√5-2√5

= √5

I hope it's help you

Answer 2

Answer:

3√5 - 6√5 + 4√5

7√5 - 6√5

√5

Answer

Step-by-step explanation:

Hope it helps

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