40.
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The expression (11.98 x 11.98 + 11.98 x x + 0.02 x 0.02) will be a perfect square forx equal to:
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A.
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0.02
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B.
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0.2
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C.
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0.04
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D.
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0.4
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Answer: Option C
Explanation:
Given expression = (11.98)2 + (0.02)2 + 11.98 x x.
For the given expression to be a perfect square, we must have
11.98 x x = 2 x 11.98 x 0.02 or x = 0.04
