help

[kaebun]

how bout this one y1=4x+5
y2=x^3+2x^2-x-3
y3+-x^3-2x^2+5x+

A) write an equation that can be solved to find the points on intersection for y1 and y2

B) write an equation that can be solved to find the x-intercepts of the graph of y3

i tried graphing it on my calculator

 

[stapel]

A Hint: Intersection points are where the (x, y) values for the equations are equal. So what do you need to set equal, in order to find where y₁ and y₂ intersect?

B Hint: What is the value of y when you cross the x-axis?

Eliz.

 

[kaebun]

so for a y1=y2 ?

 

[kaebun]

im sry i still don't get it

 

[stapel]

What's not to "get"? You set the formulas for y₁ and y₂ equal to each other, and simplify. Where are you having difficulty?

Eliz.