Question

Which of the following is a factor of 8x^2 + 21x + 10?

Answer 1

a. 2x + 5
b. 4x + 5
c. x + 2
d. None of the above

Answer 2

to factorize ax^2 + bx + c, first find 2 numbers which if multiplied, the result will be a*c, if added, the result will be b
for example:
6x^2 + 7x -3
find 2 numbers which i multiplied, the result will be 6*(-3) = -18
and if added the result will be 7
the 2 numbers will be 9 and -2
then, use this:

so the factors are (2x + 3) and (3x - 1)