Question

simplify 2√45-5√20+√30​

Answer 1

Answer:

$= > 118 \sqrt{5}$

Step-by-step explanation:

$2 \sqrt{45} - 5 \sqrt{20} + \sqrt{30} \\ = 2 \times 3 \times 3 \times 3 \times 3 \times \sqrt{5 } \\ -5 \times 2 \times 2 \times 2 \times 2 \times \sqrt{5} \\ + 2 \times 2 \times 3 \times 3 \times \sqrt{5} \\ = 162 \sqrt{5} - 80 \sqrt{5} + 36 \sqrt{5} \\ = (162 + 36 - 80) \sqrt{5} \\ = > 118 \sqrt{5}$

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