If a and b are the roots of the equation x2 – 9x + 20 = 0, find the value of a2 + b2 + ab? | MCQ Hive

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Q If a and b are the roots of the equation x2 – 9x + 20 = 0, find the value of a2 + b2 + ab?

A A. -21
B B. 1
C C. 61
D D. 21

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