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2 years ago

Gcf difference of square (trinomials (xmethod) Help with math problem

Mathematics

2 answers:

Naddik [55]2 years ago

7 0

Answer:

Step-by-step explanation:

1. x = 2 1 2 , − 2 1 2

2. x = 0 , 2

3. x = 3 , 2

Kisachek [45]2 years ago

7 0

9514 1404 393

Answer:

A) difference of squares

B) GCF

C) trinomials (X method)

Step-by-step explanation:

When a binomial is a difference of squares, factoring using the "difference of squares" method is appropriate.

The first binomial is ...

(2x)² -5² . . . . . a difference of squares

= (2x -5)(2x +5)

When the binomial is not a difference of squares, but there is a common factor, then the GCF method is appropriate.

2x³ -4x² = 2x²(x -2) . . . . . GCF method

When the expression is a trinomial, often the X method can work for factoring it.

x²-5x +6 . . . . 2 numbers are needed that sum to -5 and are factors of 6

6 = (-2)(-3), so the factorization is (by X method)

(x -2)(x -3)

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Consider a value to be significantly low if its z score less than or equal to minus−2 or consider a value to be significantly hi

den301095 [7]

Answer:

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Step-by-step explanation:

Z-score:

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu = 20.6, \sigma = 5.2$

Significantly low:

Z-scores of -2 or lower

So scores of X when Z = -2 or lower

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$X = 10.2$

Test scores of 10.2 or lower are significantly low.

Significantly high:

Z-scores of 2 or higher

So scores of X when Z = 2 or higher

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