-2 is the root of the quadratic equation x²-7x+k=0 value of k is?
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1
Answer:
it is given that -2 is one of
the root of the quadratic equation
x² - 7x + k = 0
(-2)² - 7(-2) + k = 0
4 + 14 + k = 0
18 + k = 0
∴ k = -18
Step-by-step explanation:
Answered by
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we have two roots of quadratic equations.
x²-7x+k=0
sum of roots = -2 + alpha =7 alpha =9.
product of roots= 9x-2 =k
k = -18.
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