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