Advertisements
Advertisements
प्रश्न
If one zero of the quadratic polynomial x2 + 3x + k is 2, then the value of k is ______.
पर्याय
10
- 10
5
- 5
Advertisements
उत्तर
If one zero of the quadratic polynomial x² + 3x + k is 2, then the value of k is - 10.
Explanation:
Let f(x) = x2 + 3x + k
f(2) = (2)2 + 3(2) + k = 0
4 + 6 + k = 0
k = - 10
संबंधित प्रश्न
Find the zeros of the polynomial f(x) = x2 + 7x + 12 and verify the relation between its zeroes and coefficients.
Find the zeroes of the polynomial f(x) = x2 – 2x – 8 and verify the relation between its zeroes and coefficients.
If –4 is a zero of the polynomial x2 – x – (2k + 2) is –4, then find the value of k.
If 1 is a zero of the quadratic polynomial ax2 – 3(a – 1)x – 1 is 1, then find the value of a.
If the sum of the zeros of the quadratic polynomial kx2 – 3x + 5 is 1, write the value of k.
The number of polynomials having zeroes as -2 and 5 is ______.
If x3 + 11 is divided by x2 – 3, then the possible degree of remainder is ______.
The zeroes of the quadratic polynomial x2 + kx + k, k ≠ 0 ______.
The zeroes of the polynomial 3x2 + 11x – 4 are ______.
The given linear polynomial y = f(x) has
