Question

Solve the equation by graphing x^2-5x-24=0

Answer 1

i got x=-3 and x=8

Answer 2

then you have to say

\(\normalsize\color{red}{ \bf y=x^2-5x-24 }\) plug in x values and get the coordinates just like you would get when doing a liner equation.

example:
\(\normalsize\color{red}{ \bf y=x^2-5x-24 }\)
\(\normalsize\color{red}{ \bf y=(1)^2-5(1)-24 }\)
\(\normalsize\color{red}{ \bf y=1-5-24 }\)
\(\normalsize\color{red}{ \bf y=-28 }\)
So one point is (-28)

I am going to tell you also that it is a U shaped parabola.

Answer 3

I meant to say that the point is (1, -28)

Answer 4

BUT< solving this by graphing is indeed stupid !!!!

Answer 5

i just typed the equation into a graphing calculator and found where the points crossed the x-axis and those are the solutions

Answer 6

yes, b/c in your case, y=0,

Answer 7

which happened to be (-3,0) and (8,0)

Answer 8

Here is a nice graphing utility if you need one :)
Bookmark this website or something.
https://www.desmos.com/calculator/9vs3bweyet

Answer 9

you wrote not y=, but 0=

Answer 10

i just did what i knew, solve by graphing. put in calculator and look on the x-axis for solutions of an equation.

Answer 11

yes, and these solutions are called the y-intercepts.

Answer 12

do you mean x-intercepts? because they intercept with the x-axis not the y-axis.