What is the simplified form of (x + 9)² - (x - 9)²?
(x + 9)² - (x - 9)² का सरल रूप क्या है?
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Correct Answer
C. 36x / 36x
ExplanationUsing (a + b)² - (a - b)² = 4ab gives 4 × x × 9 = 36x.
(a + b)² - (a - b)² = 4ab से 4 × x × 9 = 36x।