Question

the equation having the root -5 is​

Answer 1

Answer:

Given: One of the root of the equation is −2

Put x=−2 in 2x

2

+kx−2=0

⇒2(−2)

2

−2k−2=0

⇒8−2k−2=0

⇒−2k=−6 or k=

2

6

=3

The above equation becomes 2x

2

+3x−2=0

2x

2

+4x−x−2=0

⇒2x(x+2)−1(x+2)=0

∴(x+2)(2x−1)=0

Thus, the other root of the equation is x=

2

1