All categories

3 years ago

Which polynomial equation is a valid identity?

Mathematics

1 answer:

yulyashka [42]3 years ago

4 0

Answer:

Step-by-step explanation:

Expand factors using FOIL

(x + 1)² - x² = x² + 2x + 1 - x² = 2x + 1 ≠ 1 ← False

(5x - 2)² + 4 = 25x² - 20x + 4 + 4 = 25x² - 20x + 8 ≠ 25x² - 20x ← False

(x + 2y)(x - 2y) = x² - 4y² ≠ x² + 4xy - 4y² ← False

(2x + y)(- y - 2x) = - 2xy - 4x² - y² - 2xy = - 4x² - y² - 4xy ← True

You might be interested in

Pablo and Nadia are playing a game on a coordinate grid. Pablo puts a playing piece at point (-2, 3) and Nadia puts a playing pi

7nadin3 [17]

Answer:

The distance between the two playing pieces is of 6.4 units.

Step-by-step explanation:

Suppose we have two points:

$A = (x_{1}, y_{1})$

$B = (x_{2}, y_{2})$

The distance between these points is:

$D = \sqrt{(x_{2} - x_{1})^{2} + (y_{2} - y_{1})^{2}}$

Distance between:

A(-2,3) and B(3,-1)

$D = \sqrt{(3 - (-2))^{2} + (-1 - 3)^{2}} = \sqrt{41} = 6.4$

The distance between the two playing pieces is of 6.4 units.

5 0

3 years ago

Michael took his son Joey to get cinnamon rolls for breakfast. Each cinnamon roll has 284 calories. Joey only ate half of his ci

sergeinik [125]

Answer:

idk

Step-by-step explanation:

bc it is

5 0

3 years ago

Write the verbal phrase below as an algebraic expression.

ra1l [238]

Answer:

9 x D

Step-by-step explanation:

D being the number of doughnuts produced.

8 0

3 years ago

Simplify the expression 3[9-(2+3)]^2

Genrish500 [490]

3(9 - 5)^2
3 * $4^{2}$
16 * 3
48

7 0

3 years ago

Read 2 more answers

Which property of equality is represented?<br> If 8x = 5y - 3z, then 5y -3z = 8x

vlada-n [284]

Answer:

The symmetric property

Step-by-step explanation:

The symmetric property of equality says we can exchange the sides of an equation and it will still be true..

In symbols, it says

If a = b, then b = a.

Your statement is

If 8x = 5y - 3z, then 5y -3z = 8x

Let a = 8x and b = 5y - 3z and your statement becomes

If a=b, then b=a

It is an example of the symmetric property of equality.

6 0

4 years ago