which of the following is the value of k if one root of the quadratic equation x2+kx-8=0 is-4
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Answer:
answer is 2
Step-by-step explanation:
x2 + kx - 8 = 0
one zero is -4
therefore, By putting x=-4 in the equation..
(-4)*2 + k(-4) - 8 = 0
16 - 4k -8 = 0
8= 4k
k = 8/4
k = 2
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