If one of the roots of the quadratic equation kx2 + 2x - 8 = 0
is -2, then what is the value of k ?
Answers
Answered by
11
Answer:
k= -2
Step-by-step explanation:
x=-2
k×-2×2+2×-2-8=0
-4k-8=0
-4k=8
k=-2
Answered by
4
Answer:
=k(-2) 2+2(-2) -8=o
=-4k -4-8=0
=-4k-12=0
=-4k=12
=k=12÷(-4)
=k=-3
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