Active F-O-I-L

f(x) = (ax + b)(cx + d)

Change the values of a, b, c, and d using the sliders below.
You can use your mouse or arrow buttons to move the slider.

a: b: c: d:
f(x) = (2x + 1)(1x + 2)
= 2x2 + 4x + 1x + 2
= 2x2 + 5x + 2
 
Plot points - change the value of x with the slider to plot the point (x, f(x))
x = 0
f(x) = y = 0
Plug x in (2(0) + 1) (1(0) + 2) = (1)(2) = 2
2(0)2 + 4(0) + 1(0) + 2 = 0 + 0 + 0 + 2 = 2
2(0)2 + 5(0) + 2 = 0 + 0 + 2 = 2
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