Question

Find the value of ‘k’ if (x – 3) is a factor of 2x2

–kx + 3​

Answer 1

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x - 3 = 0

x = 3

Now:

f(x) = 2x² - kx + 3 = 0

f(3) = 2(3)² - k(3) + 3 = 0

= 2(9) - 3k + 3 = 0

= 18 - 3k + 3 = 0

= 3k = 21

= k = 7

So, the value of k is 7.

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