Question

If 2.5 is a root of the equation 2x2+5x−q=0, what are the possible values of q?

Answer 1

The possible value of q is
`25`

Explanation:

step 1

we have

`2x^(2) +5x-q=0`

If 2.5 is a root of the equation

then

substitute the value of x=2.5 in the equation and solve for q

`2(2.5)^(2) +5(2.5)-q=0`

`12.5 +12.5-q=0`

`25-q=0`

`q=25`