Solve z2 – 15z + 56 = 0 using the zero product property.

a. z = –5, –2
b. z = 8, 7
c. z = –4, 7
d. z = 8, –4

B

Heyy, this is a quadratic equation and I used the null factor law to solve this. So basically, find 2 numbers that multiply together to get 56, e.g. 8x7. But you have to make sure that the 2 numbers you choose add up to 15. Then put it in null factor law form, e.g. (z-8)(z-7)=0. Then just solve for 0. E.g. z-8=0. Which is 8. If you want, you can expand to check if it matches the original equation.. :')