Question

Choose and write the correct alternative.

(1) The sum of the roots of one of the following equations is 3. Which
one is the equation ?
(A) x + 3x + 2 = 0
(B) x2 + 3x + 2 = 0
(C) 3x + 6x + 10 = 0 (D) x2 + 3x - 2 = 0​

Answer 1

Answer:

the correct options is b

Step-by-step explanation:

x 2−3x+3=0

We know that equation ax 2+bx+c=0

Then sum of roots = a−b

(i) In equation 2x 2+3x+6=0

the sum roots = 2−3 this not as3

(ii)IN equation x 2−3x+3=0

1−3=3 this is 3

(iii) In equation

2x2 + 23x=10⇒ 2 x 2+ 23 x−10=0

Sum of roots = 2− 23 =− 23is not 3

(iv) In equation 3x

2

+3x+3=0

Sum of roots =

3

−3

=−1 This is not 3

Then in equation x

2

−3x+3=0 is 3