If x + y = 9 and xy = 20 then what is x² + y²?
यदि x + y = 9 और xy = 20 हो तो x² + y² का मान क्या होगा?
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Correct Answer
B. 41 / 41
Explanationx² + y² = (x + y)² - 2xy = 81 - 40 = 41.
x² + y² = (x + y)² - 2xy = 81 - 40 = 41।