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Airida [17]
3 years ago
12

Stion Factor the difference of squares. x2 - 400 The factored form of x2 - 400 is

Mathematics
1 answer:
Sloan [31]3 years ago
3 0

Answer:

The factored form of x²-400 is (x+20)(x-20).

Step-by-step explanation:

Given the expression

x^2\:-\:400

As the square of 20 is 400. Therefore, rewrite 400 as 20²

⇒ x^2-20^2

\mathrm{Apply\:Difference\:of\:Two\:Squares\:Formula:\:}x^2-y^2=\left(x+y\right)\left(x-y\right)

Thus, the expression becomes

x^2-20^2=\left(x+20\right)\left(x-20\right)

Thus, the factored form of x²-400 is (x+20)(x-20).

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The corresponding z score for speed of 62 mph, 47 mph, and 56 mph is 1.5, -2.25 and 0 respectively.

<h3>Z score</h3>

Z score is used to determine by how many standard deviations the raw score is above or below the mean. It is given by:

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Given that:

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The corresponding z score for speed of 62 mph, 47 mph, and 56 mph is 1.5, -2.25 and 0 respectively.

Find out more on Z score at: brainly.com/question/25638875

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