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MATHEMATICS

JAMB 2002 - Question 4

Mathematics 2002 JAMB Past Questions - Question 4: Simplify (√0.7 + √70) 2

Simplify (√0.7 + √70) 2

A: 84.7

B: 70.7

C: 217.7

D: 168.7

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Correct Answer

Explanation

To simplify the expression (√0.7 + √70)^2, we can start by expanding the expression using the distributive property.(√0.7 + √70)^2 = (√0.7 + √70)(√0.7 + √70)Using the FOIL method (First, Outer, Inner, Last), we can multiply the terms:= (√0.7 * √0.7) + (√0.7 * √70) + (√70 * √0.7) + (√70 * √70)Simplifying each term:= 0.7 + √(0.7 * 70) + √(0.7 * 70) + 70= 0.7 + √49 + √49 + 70= 0.7 + 7 + 7 + 70= 85.7Therefore, the simplified value of the expression (√0.7 + √70)^2 is 85.7.