Question

Solve the following equation:
3x^2 - 11x - 4 = 0

Answer 1

3*x^2 - 11*x - 4 = 0
(3x + 1)(x - 4) = 0
etc

Answer 2

where would the 11 have gone-- ?

Answer 3

May I help?

Answer 4

This is called factorisation - the 2 brackets will multip[ly out to be the SAME as your original equation (including the -11x)

What methods do you know for solving quadratics?

The factorising is the easiest

Answer 5

Uhm- factorising- I know the basics but i dont exactly know how to do it here

Answer 6

General form of quadratic equation:
ax^2 + bx + c = 0 <=> (x - p)(x - q) = 0
has roots p and q.
(x - p)(x - q) = x² - (p+q)x + p*q = 0
p + q = -b/a
p*q = c/a
Go on please analogically.

Answer 7

@naka354 Has given you the factorisation above:
(3x + 1)(x - 4) = 0

The 2 answers follow directly from that

Answer 8

I'm still really r e a l l y confused on the process of how 3x^2 - 11x - 4 = 0 became (3x + 1)(x - 4) = 0 --

Answer 9

If you multiply out the brackets using FOIL then you will see they ar the same