Answer:
5sqrt(5)
Step-by-step explanation:
sqrt(45)+sqrt(20)
sqrt(9*5)+sqrt(4*5)
sqrt(9)sqrt(5)+sqrt(4)sqrt(5)
3sqrt(5)+2sqrt(5)
(3+2)sqrt(5)
√45 = √9×5 = 3√5
√20 = √4×5 = 2√5
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√45 + √20 ===》 3√5 + 2√5 = 5√5
