Question

The sum of the zeroes of a quadratic polynomial 5x2- kx+2 is 7,then find the value of k​

Answer 1

$\huge\boxed{\fcolorbox{purple}{ink}{Given}}$

• 5x²-kx+2=0 is the given quadratic equation.

• Sum of the zeroes of a quadratic polynomial is 7.

$\huge\boxed{\fcolorbox{purple}{ink}{To Find}}$

• Value of k=?

$\huge\boxed{\fcolorbox{purple}{ink}{ olution}}$

Let Alpha and beeta be the given quadratic equation.

Since,

5x²-kx+2=0....(Given )

Comparing the above equation with

ax²+bx+c=0 we get,

a=5 , b=-k and c= 2

: . Alpha +beeta=-b/a.

: . 7=k/2

: . k=7×2

: . k=14

Therefore, The value of k is 14.

$\huge\boxed{\fcolorbox{pink}{ink}{ItzzHeartlessGirl}}$

Answer 2

Answer:

Let Alpha and beeta be the given quadratic equation.

Since,

5x²-kx+2=0....(Given )

Comparing the above equation with

ax²+bx+c=0 we get,

a=5 , b=-k and c= 2

: . Alpha +beeta=-b/a.

: . 7=k/2

: . k=7×2

: . k=14

Therefore, The value of k is 14.