Question

A=√20+3√5+4√45
???
D=√21×√12
???
B=√48-√27
???

Answer 1

hii mate

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here is ur answer ^↓^

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A
√20+3√5+4√45
√2×2×5+3√5+4×3√5
2√5+3√5+12√5
17√5

B
√21×√12
√3×√7×√3×√2×√2
3×2×√7
6√7

C
√48-√27
√2×2×2×2×3 - √3×3×3
4√3-3√3
1√3

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⭐hope it helps uh⭐

✨____________✨

please mark it as brainliest✌✌✌

Answer 2

A=√20+3√5+4√45
$= 2 \sqrt{5} + 3 \sqrt{5} - 42 \sqrt{5}$
$= - 37 \sqrt{5}$
B=√48-√27
$= 4 \sqrt{3} - 3 \sqrt{3}$
$= \sqrt{3}$
D=√21×√12
$= 3 \times 2 \sqrt{7}$
$= 6 \sqrt{7}$