if x = - 2 , is a solution of a quadratic equation 3x sq. +2kx -3 =0 find the valur of k.
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Answered by
1
Answer:
p(x) = 3x² + 2kx - 3
If x = -2,
p(-2) = 3(-2)² + 2k(-2) -3
0 = 3(4) - 4k - 3
0 = 12 - 4k - 3
0 = 8 - 4k
4k = 8
k = 8/4
k = 2
The value of k is 2.
Answered by
1
Answer:
Step-by-step explanation:
Answer:
p(x) = 3x² + 2kx - 3
If x = -2,
p(-2) = 3(-2)² + 2k(-2) -3
3(4) - 4k - 3 =0
12 - 4k - 3=0
8 - 4k=0
4k = 8
k = 8/4
k = 2
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