Question
(0.9 * 0.9 - 0.8 * 0.8)/1.7 = ?
Answer: Option A
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As numerator is of the form a2 - b2 = (a + b) (a - b), so the given expression simplifying becomes (0.92 - 0.82)/(0.9 + 0.8) (0.9 + 0.8) (0.9 - 0.8)/0.9 + 0.8 = 0.1
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