Question on: JAMB Mathematics - 2002
Simplify (√0.7 + √70)2
A
84.7
B
70.7
C
217.7
D
168.7
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Correct Option: A
Hint: (√a+√b)2 = (√a)2 + (√b)2 + 2√ab = a + b + 2√ab
Applying the above to thge question, we have:
0.7 + 70 + 2 x √(0.7 x 70) = 0.7 + 70 + 2√49 = 84.7
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