Question

Use complete sentences to explain how you would use graphing technology to find the solutions of 0 = −x2 + 2.5x + 1. What do the solutions of 0 = −x2 + 2.5x + 1 represent on the graph of the equation?

Answer 1

Take a look at your equation:

0=−x2+2.5x+1


This should look suspiciously similar to this:

y=−x2+2.5x+1


The reason for that is that your equation is a special case of the one I just showed you, for the case of y = 0. But y=0 is the x-axis! That means that if you graph the equation, the points where the graph crosses the x-axis are the solutions to the equation.

Answer 2

that doesnt really answer the question doe

Answer 3

how

Answer 4

just read the question and then what you wrote

Answer 5

here hold on

Answer 6

The solutions would represent the x-intercepts on the graph, since the y-value is zero. Using a ti-84, you can simply graph y=-x^2+2.5x+1, and one of the options around the top 5 buttons (probably calc) will give you a menu that you can scroll down. One of the options will allow you to calculate the x-intercept. However, you should check if the solutions are integers first. Press 2nd, then graph, which will show you the table. Look for the x value when the corresponding y value is 0.

Answer 7

hahaha whattt??

Answer 8

its hard to understand

Answer 9

yeahh, you dont say?

Answer 10

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Answer 11

byeee

Answer 12

IM BACKK!!!

Answer 13

I SEE!! HAHAH

Answer 14

BABE???? is that your boyfriend?

Answer 15

ya ii am her bf

Answer 16

ok