Question

If p and q are the roots of the polynomial equation x2+ x + q = 0, then
I. p = –1 and q = 0 II. p = 1; q = –2
A) Only I is true
B) Only II is true
C) both I and II are true
D) None of these
please explain thanks

Answer 1

Answer:

C) Both I and II are true.

For a quadratic equation,

ax² + bx + c

Sum of roots = -b/a

And product of roots = c/a

Here, -b/a = -1/1 = -1

and c/a = q/1= q

Comparing for both I and II.

I.) Sum of roots = -1+0 = -1 and product of roots = -1×0 = 0 = q

II.) Sum of roots = -2 + 1 = -1, Product of roots

= -2×1 = -2 which is again equal to q(q=-2 here)

Hence,both satisfy the conditions

So both are correct answers.

Answer 2

Answer:

B)only ll is true......