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If √5 = 2.236, then the value of √5 - 10 + √125 is equal to: 2 √5

Correct Answer: 7.826

Explanation:


√5 - 10 + √125 = (√5)2 - 20 + 2√5 x 5√5
2 √5 2√5



= 5 - 20 + 50
2√5



= 35 x √5
2√5 √5



= 35√5
10



= 7 x 2.236
2



= 7 x 1.118



= 7.826


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