If you try to solve a quadratic equation,
I promise you: It’s possible without any frustration, if you take everything, move it to one side,
sort by x squared, x and the rest. Alright. Now take the coefficients, name them a, b and
c and if you know the right formula, you will
see that you get the solution in the very next
step. Just sing this song in your head: Okay. Let’s start with our equation and our job
is going to be solving this now for x, so let’s take minus
c, multiply by 4a and if you now add b squared
it all looks way to complicated, but don’t be scared. Just take a close look to the left side and
you’ll see: There’s a binomial formula with 2ax and b,
so altogether this is the square of 2ax+b and now we have only one x, so the next step
will be to get rid of the square and if the right
side is not negative, the square root must be one solution, but
there’s an alternative, ’cause minus the square root yields the same
if you square it, so we write “plus minus” and now we are at
the point, where it only takes two more steps to solve it for
x and if you look to the left side, you know
what will be next: Subtraction of b and division by 2a is giving
us our formula for x. Okay. And it’s

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