the sum of the zeros of a quadratic polynomial 5x^2 - kx + 2 is 7 then find the value of k.
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Answered by
3
Answer:
x = 7
5x²- kx + 2=0
5(7)²-k(7)+2=0
5×49 - 7k + 2 = 0
245 - 7k + 2 = 0
247-7k = 0
7k = 247
k = 247/7
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Answered by
2
Step-by-step explanation:
ANSWER
In the quadratic polynomial ax
2
+bx+c
sum of zeroes=−
a
b
product of zeros=
a
c
The given quadratic polynomial kx
2
+5x+3k
According to question,
sum of zeros=product of zeros
⇒−
k
5
=
k
3k
⇒k=−
3
5
Answered By mr
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