D) If one root of the quadratic equation kx– 5x + 2 = 0 is 4 times the other, find k.
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Step-by-step explanation:
4(b^2-4ac)=0
4(5^2-4×k×2)=0
4(25-8k)=0
100-32k=0
-32k=-100
k=100/32
k=25/8
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