If 3x2 - kx - 15 = (3x - 5)(x + 3), the value of k is :
4
-4
3
-3
20 Likes
Given,
⇒ 3x2 - kx - 15 = 3x2 + 9x - 5x - 15
⇒ 3x2 - kx - 15 = 3x2 + 4x - 15
From above,
⇒ -k = 4
⇒ k = -4.
Hence, Option 2 is the correct option.
Answered By
6 Likes
Solve: 5x+1 + 52-x = 53 + 1
If the quadratic equation kx2 + kx + 1 = 0 has real and distinct roots, the value of k is :
0
0 and 4
0 or 4
If x2 - 4x = 5, the value of x is :
5
-1
5 or -1
5 and -1