Question

simply
√45 + √80 - 3√20​

Answer 1

Answer:

√5

Step-by-step explanation:

√45+√80-3√20

=√3×5×3 + √2×2×5×2×2 - 3√2×2×5

=3√5 +4√5- 3×2√5

= 7√5 - 6√5

= √5

Answer 2

Answer:

$\sqrt{45} + \sqrt{80} - 3 \sqrt{20}$

$\sqrt{3 \times 3 \times 5} + \sqrt{2 \times 2 \times 2 \times 2 \times 5} - 3 \sqrt{2 \times 2 \times 5}$

$= 3 \sqrt{5} + 4 \sqrt{5} - 6 \sqrt{5}$

$= 7 \sqrt{5} - 6 \sqrt{5}$

$= \sqrt{5}$

Step-by-step explanation:

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