Question

Which of the following is a zero does the function f (x) =(x+3) (x-7) (x+5)

Answer 1

Answer:

x=-3

Step-by-step explanation:

$(x + 3)$

x+3=0

-3 -3

x= -3

opposite of addition would be subtraction. since your trying to solve for x You want to get x alone and you subtract by 3 on both sides which would cancel the 3 on the left, leaving:

$x = - 3$

if you follow the same process on all of them you come to the conclusion that only -3 is a zero in the options listed.

NOTE: When you become more experienced whenever you see expressions like that you'll come to realize that the zero is the opposite sign of the number if it's just x- or x+ a number.

example:

$(x - 40)$

it'll be the opposite sign so since it's a negative the zero of that would be positive 40.

hope this helps!