<img src="https://tex.z-dn.net/?f=%5Csqrt%7B3%7D%20%2A%5Csqrt%7B15%7D" id="TexFormula1" title="\sqrt{3} *\sqrt{15}" alt="\sqrt{3

$f(x)=x^4-5x^2\\\\x^4-5x^2=0\\\\x^2(x^2-5)=0\\\\x^2[x^2-(\sqrt5)^2]=0\\\\x^2(x-\sqrt5)(x+\sqrt5)=0\iff x=0\ \vee\ x=\sqrt5\ \vee\ x=-\sqrt5$

Answer: 3 x-intercepts.

3 0

3 years ago

What is the value of x so that the line segment with endpoints W(x, −2) and X(5, −4) is parallel to the line segment with endpoi

coldgirl [10]

Answer:

x equals six start fraction one over two end fraction

Step-by-step explanation:

Segments which are parallel have the same slope. Find the slope of of YZ. Then using that value, find the slope WX and solve for the value of x.

Slope of YZ is:

$m = \frac{y_2-y_1}{x_2-x_1}=\frac{2-6}{2-5}=\frac{-4}{-3}=\frac{4}{3}$

Since they are parallel, then WX has a slope of 4/3 too.

Slope of WX is:

$m = \frac{y_2-y_1}{x_2-x_1}\\\\\frac{4}{3}=\frac{-2--4}{x-5}\\\\\frac{4}{3}=\frac{2}{x-5}\\\\\frac{4}{3} (x-5) = 2\\\\4x -20=6\\\\4x = 26\\\\x = 6\frac{1}{2}$

5 0

2 years ago

Please I Need Help!??

Romashka [77]

Answer:

x^2 and 5x

3x and 15

Step-by-step explanation:

4 0

2 years ago

Have you ever wondered how antifreeze lowers the freezing point of water in the cooling systems of automobiles? French chemist,

EastWind [94]

Answer:

It's D.

Step-by-step explanation:

4 0

2 years ago