Question

If two roots of a quadratic polynomial are -3 and 3 then the value of polynomial at x=5 is​

Answer 1

Answer:

Given quadratic equation can be written as,

x

2

−(2m)x+(8m−15)=0

Now for equal roots, Discriminant =0

⇒b

2

−4ac=0

⇒(−2m)

2

−4(8m−15)=0

⇒m

2

−8m+15=0

⇒(m−3)(m−5)=0, factor

⇒m=3,5

Answer 2

Answer:

16

Step-by-step explanation:

(x-3)(x+3)=x^2-9

hence at x=5

25-9=16