17 points. find the x and y intercepts and show work .

it’s number 2. y=x^4+2x^2-1

Y = x^4 + 2x^2 - 1
The first think I always do in such a question is get the graph.
Go to wolfranalpha.com and see the graph to tell me what I'm looking for.
Put y = x^4 + 2x^2 - 1 into the input bar. You find out that there are only 2 answers.

Use the Quadratic Formula
a = 1
b = 2
c = - 1
Then let z = x^2
So the new equation is
y = z^2 + 2x - 1
You solve for z and you get
z1 = 0.4142 and z2 = - 2.4142 You can go no further with z2 because the square root of a minus number can't be graphed on the coordinate system.

z = x^2
0.4142 = x^2
x = +/- 0.6435

Note to moderator
When I send a student to wolframalpha, the work is mine and I'm not copying and pasting anything that isn't allowed by wolfram

Where are the pictures to understand this question? we can’t you if you don’t show the graphs.

You can use a calculater and divide the minutes by the $$, hope that you