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1 year ago

Solve for x in the equation x squared 4 x minus 4 = 8.

Mathematics

2 answers:

wlad13 [49]1 year ago

4 0

Answer:

x=2 or -6

Step-by-step explanation:

×^2+4×-4=8

8 will enter inside and become -8

x^2+4x-4-8=0

x^2+4x-12

(x^2+6x)(-2x-12)

x(x+6)-2(x+6)

(x-2)(x+6)

x=2 or x=-6

saul85 [17]1 year ago

3 0

Answer:

±2√3

Step-by-step explanation:

Equation :

x² -4 = 8

x² -12 = 0

Using the quadratic formula then simplifying gives you :

±2√3

I know this lacks explanation but please brainliest

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vagabundo [1.1K]

Hi there!

Answer:

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*The answer must have a positive sign.*

Step-by-step explanation:

<h2>Lesson: Order of operations</h2>

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Step-by-step explanation:

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A marketing firm is asked to estimate the percent of existing customers who would purchase a "digital upgrade" to their basic ca

Ugo [173]

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Step-by-step explanation:

Given : A marketing firm is asked to estimate the percent of existing customers who would purchase a "digital upgrade" to their basic cable TV service.

But there is no information regarding the population proportion is mentioned.

Formula to find the samples size , if the prior estimate to the population proportion is unknown :

$n=0.25(\dfrac{z*}{E})^2$

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We know that critical value for 99% confidence interval = $z*=2.576$ [By z-table]

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Then, the minimum sample size would become :

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