Question

5. kx² - 2✓5x+4 =0 solve by having equal roots​

Answer 1

Answer:

Given equation is kx

2

−2

5

+4=0

a=k,b=−2

5

,c=4

∴D=b

2

−4ac=(−2

5

)

2

−4×k×4=20−16

We know that a quadratic equation has real and equal roots, if D=0.

⇒20−16k=0

⇒−16k=−20

⇒k=

16

20

=

4

5

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