(WILL MARK BRAINLIEST) Solve x^2-4x-12=0. SHOW YOUR WORK! show and DESCRIBE EACH STEP!

2 answers:

8 0

x^2 - 4x - 12 = 0
factors
(x - 6)(x + 2) = 0
Set (x - 6) and (x + 2) equal to 0 and solve for xx.
x - 6 = 0; x = 6
x + 2 = 0; x = -2

answer
x = -2 or x = 6

Reika [66]4 years ago

5 0

Since −12-12 does not contain the variable to solve for, move it to the right side of the equation by adding 12 to both sides.x2−4x=12Move 12 to the left side of the equation by subtracting it from both sides.x2−4x−12=0Factor x2−4x−12x2-4x-12 using the AC method.(x−6)(x+2)=0Set x−6 equal to 0 and solve for x.x=6Set x+2 equal to 0 and solve for x.x=−2The solution is the result of x−6=0 and x+2=0x=6,−2

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You want to know the opinions of American school teachers about establishing a national test for high school graduation. You obt

GaryK [48]

Answer: D) all American school teachers.

Step-by-step explanation:

In statistics, A population is a very large set of individuals or values that belong to a specified group established by researcher.

A sample is a subset of population that represents the entire population in research.

Given : We want to know the opinions of American school teachers about establishing a national test for high school graduation.

Clearly , by the above definition

Population = all American school teachers.

You obtain a list of the members of the National Education Association and mail a questionnaire to 2500 teachers chosen at random from this list.

sample = 2500 teachers chosen at random from this list.