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