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