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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 for x equal to:

Correct Answer: 0.04

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


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