x2 - x - 2 = 0
(x - 2)(x + 1) = 0
x = 2 and -1
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The answer to x2 - 2x - 4y2 - 4y =(x - 2y)(x - 2y - 2)
x = ? 42 = x squared minus x
To shift a funcion (or its graph) down "a" units, you subtract "a" from the function. For example, x squared gives you a certain graph; "x squared minus a" will give you the same graph, but shifted down "a" units. Similarly, you can shift a graph upwards "a" units, by adding "a" to the function.
x^2-4x/x^2-6x+8 = x(x-4)/(x-2)(x-4) = x/(x-2)
X2 - 4= (x + 2)(x - 2)===========