Answer:
2√5
Step-by-step explanation:
√20
√4 ×√5
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√20=√2⋅2⋅5. =√22⋅5. =2√5.
0.9(17) -2.7(3) =
15.3-8.1
=7.2
11
11+8=19
19x3=57
4x/5-2
