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3 years ago

How do I solve 12x^2-89x-56 factor by grouping

1 answer:

7 0

Use ac method

multiply 12 and -56
-672
now find what 2 factors of -672 add to -89
answer is -96 and 7

expand the middle term like that
12x²-96x+7x-56
group
(12x²-96x)+(7x-56)
factor
12x(x-8)+7(x-8)
undistribute the (x-8)
(x-8)(12x+7) is answer

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Answer:

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Step-by-step explanation:

Given data

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3 years ago

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Romashka-Z-Leto [24]

Step-by-step explanation:

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2 years ago

. Use the statistical features of your calculator to find the mean and the standard deviation to the nearest tenth of a data set

uysha [10]

Answer:

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Step-by-step explanation:

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$Mean = \frac{\text{Sum of all the observation}}{\text{Total number of observation}}$

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Thus Mean to the nearest tenth is 1.9

Standard Deviation is the square root of sum of square of the distance of observation from the mean.

$Standard deviation(\sigma) = \sqrt{\frac{1}{n}\sum_{i=1}^{n}{(x_{i}-\bar{x})^{2}} }$

where, $\bar{x}$ is mean of the distribution.

Putting all values in the formula, We get

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2 years ago

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BigorU [14]

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2 years ago

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