There is no particular significance in those results. The world will not end tomorrow and, if the rest of the method for this question is correct, you may even get full marks for it!
7*sqrt(2) = 9.899 to 3 dp
x-y=4
x2-x3+2x = 0 x(-x2+x+2) = 0 x(-x+2)(x+1) = 0 Points of intersection are: (0, 2), (2,10) and (-1, 1)
It is the set of infinitely many points on a straight line in 2-dimensional space. The points satisfy the equation x + y = 2 or y = 2 - x
you put the y intercept at 2, the x intercept at -2/3 and you join those two points.
x/2 = 2 *2 *2 x=4
The points of intersection are: (7/3, 1/3) and (3, 1)
y - 2 = 0
The points of intersection of the equations 4y^2 -3x^2 = 1 and x -2 = 1 are at (0, -1/2) and (-1, -1)
4x = 2 x= 2/4 x= .5
That can be written as 2 x 2 x 2 x 2 and it equals 16.
In two dimensions, the infinitely many points with coordinates of the form (x, x-2) where x is any number.