Which of the following functions has a zero at x=-2

A. f (x) = (x+2) ^2 - 5

B. f (x) = x^2 - 6x+8

C. f (x) = (x-2) ^2 + 1

D. f (x) = x (x+2)

Question

Mathematics

Rohan Davies

29 August, 17:16

Which of the following functions has a zero at x=-2

A. f (x) = (x+2) ^2 - 5

B. f (x) = x^2 - 6x+8

C. f (x) = (x-2) ^2 + 1

D. f (x) = x (x+2)

+4

Answers (1)

Know the Answer?

Jovanni · Answer 1

Plug in - 2 for x for every function and set every function to 0. If it equals 0 then there's a "zero" at x=-2

Example A: 0 = (-2+2) ^2 - 5 = 0 - 5 = - 5 < - - This does not = 0 so it's not the answer

Which of the following functions has a zero at x=-2A. f (x) = (x+2) ^2 - 5B. f (x) = x^2 - 6x+8C. f (x) = (x-2) ^2 + 1D. f (x) = x (x+2)

Which of the following functions has a zero at x=-2

A. f (x) = (x+2) ^2 - 5

B. f (x) = x^2 - 6x+8

C. f (x) = (x-2) ^2 + 1

D. f (x) = x (x+2)