Answer:
5.3 or 28
Step-by-step explanation:
+=
36+=64
64-36=28
=5.29 or 5.3
X=117 degrees
Y = 63 degrees
Z = 117 degrees
Just subsitute values for x and get values for y
(x,y)
(0,-2)
(1,1)
(-1,-5)
(-2,-8)
here is the graph
To use division to find the decimal equivalent of a rational number, divide the top number by the bottom number. You will get a decimal number.
You can find the number of x intercepts by setting f(x) equal to zero giving you 0=x^4-5x^2. You can factor out an x^2 and divide on both sides (when you divide 0 by anything it is still zero so the x^2 disappears), and you are left with 0=x^2-5, which you can solve easily giving you x=+/- sqrt(5). However, the original equation also has an x intercept at (0,0) which you can see by plugging 0 in for x. So the grand total of x intercepts is 3!