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3 years ago

Whats the GCF of 84 and 56?

Mathematics

1 answer:

kiruha [24]3 years ago

8 0

Answer:

The Greatest Common Factor (GCF) for 56 and 84, notation CGF(56,84), is 28.

Step-by-step explanation:

The factors of 56 are 1,2,4,7,8,14,28,56;

The factors of 84 are 1,2,3,4,6,7,12,14,21,28,42,84.

So, as we can see, the Greatest Common Factor or Divisor is 28, because it is the greatest number that divides evenly into all of them.

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2 years ago

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2 years ago

If a polynomial function f(x) has roots 6 and square root of 5, what must also be a root of f(x)?

ivolga24 [154]

Answer:

- $\sqrt{5}$

Step-by-step explanation:

A root with square root or under root is only obtained when we take the square root of both sides. Remember that when we take a square root, there are two possible answers:

One answer with positive square root
One answer with negative square root

For example, for the equation:

$x^{2}=3$

If we take the square root of both sides, the answers will be:

$x=\sqrt{3} \text{ or } x= -\sqrt{3}$

Only getting one solution with square root is not possible. Solutions with square root always occur in pairs.

For given case, the roots are 6 and $\sqrt{5}$ . Therefore, the 3rd root of the polynomial function f(x) had to be - $\sqrt{5}$

It seems you made error while writing option B, it should be - square root of 5.

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3 years ago