Question

ANSWER WITH EXPLANATION
The quadratic equation whose roots are ±√7 is
a.x^2+7=0
b.x^2-7=0
c.x^2+x+7=0
d.x^2-x-7=0

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Answer 1

Answer:

Correct option is

D

1,

4

13

Given Quadratic equation is

2x

2

−9x+7=0

Comparing it with the general form of quadratic equation ax

2

+bx+c=0

we write, a=2,b=−9,c=7

Quadratic formula is x=

2a

−b±

b

2

−4ac

⟹x=

2(2)

−(−9)±

(−9)

2

−4(2)(7)

⟹x=

4

9±

81−56

⟹x=

4

9±

25

⟹x=

4

9±5

⟹x=

4

9+5

x=

4

9−5

⟹x=1,

2

7

Step-by-step explanation:

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