Question

Solve x2 + 9x = -3

Answer 1

add 3 to both sides, and you get a quadratic equation of the form :
\[ax^2+bx+c=0\]

Answer 2

what do you get after adding 3 on both sides ?

Answer 3

12x and 0

Answer 4

umm, nopes.
x^2+9x =-3
x^2 +9x +3 = -3+3
x^2 +9x +3 =0
got this ?

Answer 5

ohh...

Answer 6

now,
Compare your quadratic equation with \(ax^2+bx+c=0\)
find \[a=...?\\b=...?\\c=...?\]
then the two roots of x are:
\(\huge{x_{1,2}=\frac{-b \pm \sqrt{b^2-4ac}}{2a}}\)

Answer 7

could you find the values of a,b,c ?