14-06-2020
Mathematics

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1)If (x-2) is a factor of x2+ 3ax -2a, then find the value of a

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14-06-2020

Answer:

x - 2 => x = 2

x² + 3ax - 2a

=> 2² + 3 × a × 2 - 2 × a

=> 4 + 6a - 2a

=> 4 + 4a

=> 4 ( 1 + a )

★ 1 + a = 0

a = -1

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