2. If the sum of zeroes of a quadratic polynomial f(x) = 5x2 – (3 + k)x + 7 is 0, find the value of k.
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The answer is given below :
The given quadratic polynomial² is
f(x) = 5x² - (3 + k)x + 7
Now, the sum of the zeroes be
= - {- (3 + k)}/5
= (3 + k)/5
Given that,
(3 + k)/5 = 0
⇒ k + 3 = 0
⇒ k = - 3
∴ the value of k is (- 3).
I hope that it helps you.
The given quadratic polynomial² is
f(x) = 5x² - (3 + k)x + 7
Now, the sum of the zeroes be
= - {- (3 + k)}/5
= (3 + k)/5
Given that,
(3 + k)/5 = 0
⇒ k + 3 = 0
⇒ k = - 3
∴ the value of k is (- 3).
I hope that it helps you.
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