Question

Evaluate (√7-2√10)+(√9-4√5)​

Answer 1

Answer:

2 - √2

Step-by-step explanation:

(√7-2√10) + (√9-4√5)

= [√(5+2-2√10)] + [√(4 + 5 - 4√5)]

= [√(√5 - √2)²] + [√(2 - √5)²]                  [a²+b²-2ab = (a-b)²]

= √5 - √2 + 2 - √5

= 2 - √2

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