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If x=2 is a root of the polynomial f(x)=2x³-3x+7a,find the value of a

Posted by Aman Chaurasiya 5 years, 7 months ago

CBSE > Class 09 > Mathematics

1 answers

Yogita Ingle 5 years, 7 months ago

f(x)=2x³-3x+7a

x = 2 is a root of the polynomial

2x³ - 3x + 7a =0

2(2)³ - 3(2) + 7a = 0

2(8) - 6 + 7a = 0

16- 6 + 7a = 0

10 + 7a = 0

7a = -10

a = -10/7

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