How do you solve $x^2 +11x+30=0$ ?

Question

18428 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2016-07-14T09:47:46

$x = -6 or x= -5$

We need to factorise first.
Find factors of 30 which add up to 11. The signs in the brackets will be the same, both positive.

$5xx6 = 30, and 5 + 6 = 11$

#(x+5)(x+6) = 0

We are multiplying two factors and getting the answer 0, Therefore one of the factors must be 0.

$if x + 5 = 0, x = -5$
$if x +6 = 0, x =-6$

How do you solve x^2 +11x+30=0x^2 +11x+30=0?