Question

What is the zero of 2x^2 + 7?

Answer 1

Is it -2^2/7?

Answer 2

Set it equal to zero, then solve for x.

Answer 3

\[2x^2 + 7 = 0\]

Solve for X as smith said, simple algebra.

Start by subtracting 7

Answer 4

2x^2 = -7

Answer 5

ohh it's -7/2x^2

Answer 6

right?

Answer 7

@ShadowLegendX

Answer 8

@agent0smith

Answer 9

\[2x^2 + 7 = 0\]

Solve for X as smith said, simple algebra.

Start by subtracting 7

Answer 10

2x^2 = -7

Up to here you're right, but you did something very wrong from there. Just divide both sides by 2, NOT 2x^2.

Answer 11

-7/2

Answer 12

Yes. So what is your equation now? It's not just -7/2, that's not an equation.

Answer 13

x-7/2 ?

Answer 14

woops

Answer 15

Your equation was

2x^2 = -7

Then you divided both sides by 2.

Answer 16

Ohh. x^2 = -7/2

Answer 17

Yes. Now you can solve by taking the square root of both sides.

Answer 18

Hmm, i'm not sure on how to do that

Answer 19

If \(x^2 = k\), then \(x = \pm \sqrt k\).