(09.02)

Mathematics

1 answer:

Yuki888 [10]3 years ago

4 0

Answer:

x = - 2, x = 10

Step-by-step explanation:

Given

x² - 8x - 20 = 0

Consider the factors of the constant term (- 20) which sum to give the coefficient of the x- term (- 8)

The factors are - 10 and + 2 , since

- 10 × 2 = - 20 and - 10 + 2 = - 8 , then

(x - 10)(x + 2) = 0

Equate each factor to zero and soilve for x

x + 2 = 0 ⇒ x = - 2

x - 10 = 0 ⇒ x = 10

You might be interested in

How do i solve this ?<br><img src="https://tex.z-dn.net/?f=5y%20-%202y%20%3D%2010%20%5C%5C%20" id="TexFormula1" title="5y - 2y =

Scorpion4ik [409]

Answer:

Step-by-step explanation:

5y - 2y = 10

3y = 10

y = 10/3 = 3⅓

3 0

3 years ago

Your neighbor agreed to trudge through the snow to buy snow shovels for 10 families on your street! The store owner gave him a d

Firlakuza [10]

Answer:

$17

Step-by-step explanation:

We are assuming that snow shovels for 10 families means 10 shovel in total. If the manager is offering $2 discount per shovel, and there are ten shovels, then that is a 20 dollar discount. 85, the cost after discount, plus 20 is 105. 105/10=10.5. Your family is offering two pay for two shovels, so the total for you would come to $21, but there is the $2 discount, so subtract 4 dollars, and you have $17.

5 0

3 years ago

Will an exponential function always, never, or sometimes exceed a polynomial function?

patriot [66]

At some point, the exponential function always exceeds a polynomial function.

3 0

3 years ago

Read 2 more answers

How is a system of equations created when each linear function is given as a set of two ordered pairs. Explain

NNADVOKAT [17]

Answer:

Please check the explanation.

Step-by-step explanation:

If each linear function is given as a set of two ordered pairs, all we need is to find a slope between two lines and put one of the points in the slope- intercept form of the line equation to find the y-intercept 'b' and then writing the equation in the slope-intercept form. This is how we can generate a system of equations.

For example, let suppose a linear function has the following ordered pairs: