Graph both, find intersects
x**2-y-4x+2=0 --> x**2-4x+2=y
x-2y+4=0 --> (x+4)/2=y
x**2-4x+2=(x+4)/2
2x**2-8x+4=x+4
2x**2-9x+4=4
2x**2-9x=0
x(2x-9)=0
x=0, 9/2
y=(0+4)/2=2
y=(9/2+4)/2=17/4
y=2, 17/4
Intersect coordinates
(0, 2), (4.5,4.25)
Awnser = Start paying attention in class.
By graphing the lines on the coordinated plane they will intersect at (2, -4) which is the solution of the equations
2nd [CATALOG], solve( , enter equation, variable and guess after the bracket, close brackets with " ) ". You can also put lower and upper bounds after the guess.
Substitution is a way to solve without graphing, and sometimes there are equations that are impossible or very difficult to graph that are easier to just substitute. Mostly though, it is a way to solve if you have no calculator or cannot use one (for a test or worksheet).
Its kind of hard to draw a graph in pure text... Try plugging your equation into www.wolframalpha.com/ ;)
A graphing calculator is used to plot graphs and solve equations. Most graphing calculators are programmable so one can create customized programs.
Awnser = Start paying attention in class.
Graph the equation then find the x intercepts.
A graphing calculator is a calculator with the capability of graphing an equation on a built-in coordinate grid on the screen. They usually have a simple LCD grid screen, and by typing in the equation (e.g., 5x+3), the screen refreshes to display a graph of the equation in a set window range.
By graphing the lines on the coordinated plane they will intersect at (2, -4) which is the solution of the equations
2nd [CATALOG], solve( , enter equation, variable and guess after the bracket, close brackets with " ) ". You can also put lower and upper bounds after the guess.
Unless it's a fancy graphing calculator, you don't. When solving an inequality, you need to solve it as an equality, remaining mindful of the proper direction of the inequality symbol after each step.
Substitution is a way to solve without graphing, and sometimes there are equations that are impossible or very difficult to graph that are easier to just substitute. Mostly though, it is a way to solve if you have no calculator or cannot use one (for a test or worksheet).
3225. Is really a question worth answering? I mean, you can solve it with a calculator. LOL.
1. Be sure that your graphing calculator is in degree mode. 2. Press sin( 3. Press 72, ) 4. Press Enter The calculator shows: .9510565163 5. Round to .95 Answer: sin 72° = .95
The solution consists of the infinite number of points on the line which is defined by y + x = 6.
Its kind of hard to draw a graph in pure text... Try plugging your equation into www.wolframalpha.com/ ;)