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3 years ago

Factor x^2+2x-63 completely if the polynomial is a prime, state so.

Mathematics

2 answers:

WINSTONCH [101]3 years ago

5 0

Hey there !

Check the attachment.
Hope it helps you :)

Svetllana [295]3 years ago

4 0

The only two usable numbers that make up 63 are 9 and 7 and 21 and 3 in some form. So that's how you start the question.

(x 9)(x 7) is what you can get. The 2x is very small, so it suggests that 21 and 3 are not the right factors.

You have a plus 2 as the middle term. That is exactly the difference between 9 and 7. That tells you the sign on 9 because it is larger than 7.

(x + 9) ( x 7) is what you have so far. Since 63 is minus, the 7 must be minus. Now what you have is
(x + 9)(x - 7) and that is the final answer.

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4 years ago

(Marking Brainliest) What is the vertex form of the equation? y = x^2 - 4x + 7

AysviL [449]

Step-by-step explanation:

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the general vertex form is

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to bring the part "x² -4x" to an expression of (ax + b)² we need to add 4, as "x² - 4x + 4" = (x - 2)².

and since we add 4 there, we need to subtract 4 overall again to keep the value of the expression the same :

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2 years ago

7. Marcy is taking part in a summer movie club. She will

goldenfox [79]

Answer:

The equation that represents the relationship between 'y' the total points, and 'x' the number of movies is option A;

A y = 3·x

Step-by-step explanation:

The information required in the question is an equation that represents the the relationship between the number of movie attended and the total number of points Marcy has given that she earns a fixed amount of points for attending each movie

The number of points she will earn for attending each movie = 3 points

The total number of points she will earn 'y' when she attends 'x' number of movies is given as follows;

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Therefore the equation that represents the relationship between 'y' the total points, and 'x' the number of movies is y = 3·x.

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3 years ago

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IRINA_888 [86]

Answer:

x = 0

Step-by-step explanation:

Please see the step-by-step solution in the picture attached below.

Hope this answer can help you. Have a nice day!

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3 years ago

Read 2 more answers

(surds) write this in the simplest form and then simplify the expression

Stells [14]

Answer: $\bold{\sqrt{2}-15\sqrt{3}}$

Step-by-step explanation:

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4 years ago