How do you find zeros of a function in intercept form?

Answer 1

if you want to find the zero/null /x-intercept of any given function you have to find the x that makes it zero. therefore if

f(x) = 2x +4

you have to put

f(x) = 0

0 = 2x +4

2x = -4

x=-2

if you subsitute -2 for x you will find that the function f(x) will equal zero

f(x)= 2 * (-2) +4

f(x) = -4 +4

f(x) = 0

if you have more complex functions like squared your approach will look something like this

say g(x) is a function of x²

g(x)=(x-2)² +4

set g(x)= 0

0= (x-2)² -4

4= (x-2) ²

+ or - radical (4) = x -2

2 + radical (4) = x or 2 -radical (4) = x

x=4 or x = 0

remember radicals always have two solutions