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.
x(x - 1) = x2 + x x2 - x = x2 + x The only solution to this equation is x = 0
Using the quadratic equation formula:- x = 3.795831523 or x = -5.795831523
Equals anything... x is a variable. If that equation was set equal to zero then you could solve for x, but that is not what you have asked.
If 3x - 1 = 11: To solve this equation, add 1 to each side of the equation to isolate x (3x -1 +1 = 11 + 1) and now the equation is 3x = 12. The next step is to divide both sides of the equation by 3 to find the value of x (3x / 3 = 12 / 3) for the answer x = 4. Not sure what you mean by x2 x, but you can substitute the value of x (which is 4) to solve.
x=18
Divide both sides of the equation by x: x2 = 9x x2 / x = 9x / x x = 9
x(x - 1) = x2 + x x2 - x = x2 + x The only solution to this equation is x = 0
Using the quadratic equation formula:- x = 3.795831523 or x = -5.795831523
Equals anything... x is a variable. If that equation was set equal to zero then you could solve for x, but that is not what you have asked.
X2 = k Take square root each side. X = (+/-) sqrt(k) ============
If 3x - 1 = 11: To solve this equation, add 1 to each side of the equation to isolate x (3x -1 +1 = 11 + 1) and now the equation is 3x = 12. The next step is to divide both sides of the equation by 3 to find the value of x (3x / 3 = 12 / 3) for the answer x = 4. Not sure what you mean by x2 x, but you can substitute the value of x (which is 4) to solve.
X(X2 - X)
y=b+x+x^2 This is a quadratic equation. The graph is a parabola. The quadratic equation formula or factoring can be used to solve this.
x=18
x: x2 - 81 = 0
x2+x-15 = 0 Using the quadratic equation formula: x = 3.405124838 or x = -4.405124838
Factor the original equation to get (x-7)(x+2)=0, so x=7 or x=-2