Question

factor 3x^2 + 10x + 7=0

Answer 1

x=-7/3, -1

Answer 2

so its ax^2+bx+c multiply a by c which would be 70 and find two multiples that equal 10.

Answer 3

@ludvic It's already solved what are you waiting??

Answer 4

I got it already

Answer 5

factor 3x^2 + 10x + 7=0

Everything is positive.
The first and last values are Prime (3 and 7).
It has to be one of these:

(3x+1)(x+7)
(3x+7)(x+1)

Always good to keep in mind various ways of proceeding. No need to try to go through life with only one method in your pocket.