- Thread starter
- #1

5(x + 4)(x + 2) = x^2 + 6x + 8

5(x + 4)(x + 2) = 5x^2 + 30x + 40

This is the point where I am unsure?

5x^2 + 30x + 40

5 is already a prime, so when I think 10 goes into 30 three times and 10 goes into 40 four times, thus I end up with;

x^2 + 3x + 4 have I completed this correct or should I do it this way;

x^2 + 6x + 5

Thanks