Question

Can somebody help?

Answer 1

@AZ

Answer 2

Do you want to do it the long way or the short way?

The short way is graph it
https://www.desmos.com/calculator

and see what the positive x-value is when it crosses the x-axis (so when y = 0)

Answer 3

The long way is using the quadratic formula

\( x = \dfrac{ -b \pm \sqrt{b^2 - 4ac}}{2a} \)

when the equation is \( ax^2 + bx + c = 0\)

and so your equation is
f(x) = 2x^2 + 5x - 12

that means
a = 2
b = 5
c = -12

Plug that into the quadratic formula

Answer 4

I graphed it

Answer 5

what is the positive x-value when y = 0

Answer 6

1/5?

Answer 7

Be careful

that says 1.5

what is 1.5 as a fraction?

Answer 8

3/2

Answer 9

That's your answer

Answer 10

So it would just be 3?

Answer 11

?

Answer 12

No what is 3/2

3/2 is the same thing as 1 1/2