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3 years ago

6

What set does belong to ?

1 answer:

Harrizon [31]3 years ago

7 0

Irrational numbers

it cannot be written as a fraction, there for it is irrational, the test for rational numbers is to try and write it as a fraction, if that is possible without rounding the number, it is a rational number otherwise it is irrational.

if you try to simplify the question you will find that it gives you the square root of 159, which cannot correctly be written as a fraction no matter how hard you try, there for it is a irrational number

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PLSSS ANSWER, 35 pointss

xxTIMURxx [149]

Answer:

1.

$(y - 5)(x + y)$

2.

${(x - y)}(x - y + a)$

3.

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Step-by-step explanation:

1. The given polynomial is

$x(y - 5) - y(5 - y)$

We need to factor the second part to get:

$x(y - 5) + y(y - 5)$

We factor y-5 to obtain:

$(y - 5)(x + y)$

2. We have

${(x - y)}^{2} - a(y - x)$

We again factor -1 from the second part to get:

${(x - y)}^{2} + a(x- y)$

We now factor x-y to get:

${(x - y)}^{2} + a(x- y)$

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3. We have

$2(3 - b) + 5 {(b - 3})^{2}$

We factor negative 1 from the first part to get

$- 2(b - 3) + 5 {(b - 3})^{2}$

We now factor b-3 to get:

$(b - 3)( - 2 + 5(b - 3))$

We now simplify to get:

$(b - 3)( - 2 + 5b - 15) = (b - 3)(5b - 17)$

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