How many zeros does the polynomial function, y = (x + 4)(x - 2)? (x+7) have? Α. 2
Β. 1
Ο Ο Ο Ο
C. 3
D. 4

The linear equation is: y=ax+b

So the first thing we do is to multiply the top equation by 3. the reason i want to do this is i notice there will be a 6y on both equations and can possibly add/subtract them. so we get 6y = -3x + 27. adding that and the second equation we get 6x = 27-15 which is 12. divide by 6 and we get 2. ∴ x = 2. substituting 2 into the first equation we get 2y = -2 + 9 which is 7. divide by 2 and we get 7/2. ∴ y = 7/2, x = 2.

Really any number between them works. for example 144.951