please solve (c)step by step very urgent
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Answer:
10√5+20
Step-by-step explanation:
=10/√5-2
=10/√5-2×√5+2/√5+2
=10√5+20/(√5)²-2² (a²-b²= (a+b)(a-b)
=10√5+20/5-4
= 10√5+20
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