x^2 = x*x, so multiply X by itself.
For example, 4^2 would be 4*4=16.
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x=18
You cannot, in general, solve one equation with two unknown variables. x - y = x - x2 Subtract x from both sides: - y = - x2 Change signs: y = x2 And that is as far as you can go.
144X = X2 144X - X2 = 0 (144 - X)X = 0 X = 0 or X = 144
This is an expression and you do not solve an expression, but you can factor this one.X2 + 3X4X2(1 + 3X2)========
Points: (x1, y1) and (x2, y2) Slope: y1-y2/x1-x2