Question

√45 -3√20 +4√5 please help me solve it

Answer 1

Answer:

$\sqrt{45} - 3 \sqrt{20} + 4 \sqrt{5} \\ \\ = > \sqrt{5 \times 9} - 3 \sqrt{20} + 4 \sqrt{5} \\ \\ \\ = > 3 \sqrt{5} - 3\sqrt{5 \times 4} + 4 \sqrt{5} \\ \\ \\ = > \sqrt{5} (3 - 6 + 4) = \sqrt{5}$

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Answer 2

Step-by-step explanation:

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$\sqrt{45} - 3 \sqrt{20} + 4 \sqrt{5}$

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√45 = √ 5×3²

√45 = 3√5................(1)

3√20 = 3 √5×2²

3√20 = 6√5

solving further,

3√5 - 6√5 + 4√5

-3√5 + 4√5

√5

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