Question

The quadratic equations2x2 +px+3=9 has two equal roots when the value of p is

Answer 1

Answer:

For equal roots, p should be 6√(-2)

Step-by-step explanation:

An quadratic equation in the form

ax^2+bx+c=0 has equal roots when the term b^2=4ac.

This equation :

2x^2+px+3=9

2x^2+px-6=0

For this equation,

a=2, b=p, c=3-9=-6

So, p^2=4*2*(-6)

p^2=(-72)

p=√(-72)

p=6i√2, where i=√(-1)