CAT QA MCQ problem 18: If x=3 and y=19, what is x²+y²?
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Correct Answer: C. 370
Explanation:
3²+19²=370.
Practice India questions with answers and explanations.
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3²+19²=370.
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Area=4×3=12.
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By Vieta, root sum is the coefficient 11.
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(6+9)/2=7.5.
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Increase/base ×100 = 25%.
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9²+18²=405.
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Area=10×21=210.
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By Vieta, root sum is the coefficient 16.
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(12+8)/2=10.0.
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Increase/base ×100 = 25%.
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Area=15×4=60.
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Area=3×6=18.