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E.g you have 2 equations and have to set them equal to each other. 
2x + 3y = 6 
-3x +  y = 2

multiply first equation by 3, second by 2 to get
6 x + 9y = 18
-6 x +...

When you differentiate, the constant disappears, because it is not dependent of the variable. So when you integrate, you have to add the constant again. However, you can't know the vaulue of c without ...

For all quadratic equations, you can use the quadratic formula. Given an equation of the form ax²+bx+c, you can plug those va...

y = e^2x(x²+1)^5/2

The first step is to calculate dy/dx. We can do this by splitting y into two parts and using the chain rule of differentiation:

Recall that for two lines to be skew they must satisfy two conditions:

1) They must not be parallel.

2) They must not intersect.

We shall check each condition ...