Question

Solve x^2 – 3x = –8

Answer 1

so I guess complex numbers are what you are focusing on nowadays ?

Answer 2

Partially but for this, i need the quadratic formula

Answer 3

did you try to use the quadratic formula ?

Answer 4

you should already have 40+ years of expirience with it by now

Answer 5

I didn't learn this at the age of 10..

Answer 6

well maybe you forgot after you retired :) do you know the formula ?

Answer 7

Yes i do (:

Answer 8

so what did you get when you used it ?

Answer 9

A very wrong answer lol

Answer 10

can you show what you did ?

Answer 11

\[-3 \pm \sqrt{3^{2} - 4(8)} \div 2\]

Answer 12

also the -3 is divided by 2 , right ?

Answer 13

Yes the entire equation.

Answer 14

but, it should be 3 not -3

Answer 15

x^2-3x+8=0
a=1
b=-3
c=8

Answer 16

Oh because the negatives cancel out

Answer 17

so now do you get correct answers ?

Answer 18

I'm suck at \[3 \pm \sqrt{9-32} \div 2\]

Answer 19

It's OK, it's just been a few decades since you did this :)



Can you continue the above ^^^