Question

if x = -1/2 is a solution of quadratic equation 3x^2 + 2kx -3 = 0 then find the value of k

Answer 1

answer :

The given equation is 2kx

2

−40x+25=0

Here, a=2k,b=−40,c=25

∴D=b

2

−4ac=(−40)

2

−4×2k×25=1600−200k

The equation will have equal roots, if D=0⇒1600−200k=0

⇒k=8

Substituting k=8 in the given equation, we get

16x

2

−40x+25=0⇒(4x−5)

2

=0⇒x=

4

5

Hence, the roots of the given equation are each equal to 5/4.

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Answer 2

Answer:

Answer:- 5 / 4

Step-by-step explanation:

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