Intro
2x C#m A E B
[Verse 1]
C#m A
If you try to solve a quadratic equation,
E B
I promise you: It's possible without any frustration,
C#m A
if you take everything, move it to one side,
E B
sort by x squared, x and the rest. Alright.
C#m A
Take the coefficients, name them a, b and c
E B
and if you know the right formula, you will see
C#m A
that you get the solution in the very next step.
E B
Just sing this song in your head:
[Chorus]
C#m A E B
Negative b plus or minus the square root of
C#m A E B
b squared minus 4ac over 2a
[Verse 2]
C#m A
Okay. Let's start with our equation and our job is going to be
E B
solving this now for x, so let's take minus c,
C#m A
multiply by 4a and if you now add b squared
E B
it all looks way to complicated, but don't be scared.
C#m A
Just take a close look to the left side and you'll see:
E B
There's a binomial formula with 2ax and b,
C#m A
so altogether this is the square of 2ax+b
E B
and now we have only one x, so the next step will be
C#m A
to get rid of the square and if the right side is not negative,
E B
the square root must be one solution, but there's an alternative,
C#m A
'cause minus the square root yields the same if you square it,
E B
so we write "plus minus" and now we are at the point, where it
C#m A
only takes two more steps to solve it for x
E B
and if you look to the left side, you know what will be next:
C#m A E B
Subtraction of b and division by 2a is giving us our formula for x. Okay. And it's
[Chorus]
C#m A E B
Negative b plus or minus the square root of
C#m A E B
b squared minus 4ac over 2a
C#m A E B
Negative b plus or minus the square root of
C#m A E B
b squared minus 4ac over 2a
D#m B F# C#
Negative b plus or minus the square root of
D#m B F# C#
b squared minus 4ac over 2a
D#m B F# C#
Negative b plus or minus the square root of
D#m B F# C#
b squared minus 4ac over 2a