Does someone know the answers and how to solve them?

Mathematics

1 answer:

il63 [147K]3 years ago

4 0

Answer: D

Step-by-step explanation:

Yeah, lets look at each of the functions. I'll refer to them as A, B, C, D, and E.

A) f(x)=x^2-16

This has two zero. x^2-16= (x+4)(x-4), which two zeroes include -4 and 4.

Here we introduce an important concept, if the function isn't a perfect square, and is a quadratic, it has two zeroes.

B) This is linear, so it obviously has 1 zero.

C) Two zeroes, because it isn't a perfect square.

D) x^2-10x+25 = (x-5)^2, so it has only one zero.

E) Not a perfect square, so two roots.

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