3 years ago

X^2 -x-20=0 Solve the equation by completing the square

Mathematics

1 answer:

Igoryamba3 years ago

4 0

X=4
first you add 20 to both sides
then you try all numbers that square to get less than 20 and 4 is the correct one

You might be interested in

Adding parentheses and brackets

eduard

Answer:

what is the question

Step-by-step explanation:

5 0

3 years ago

What is the length of line FB?

juin [17]

The length of the line is 21.

8 0

3 years ago

A line passes through the points (1, 3) and (3, -1) on a coordinate plane. What is the equation of this line in slope-intercept

FromTheMoon [43]

Answer:

y=[-2]x[+][5]

Step-by-step explanation:

$\frac{-1-3}{3-1}=\frac{-4}{2} =-2$ m= -2

Using the point (1,3) Find the value of b

3= -2(1)+b

3= -2+b

+2 +2

---------

5=b

y= -2x+5

4 0

2 years ago

Read 2 more answers

Can someone please explain the area of a circle in the simplest way possible, no links

AlekseyPX

So, for the area of a circle, there should be a line in the middle. Correct?

Well, that line is the diameter. Then cut that in half, so if the diameter is 6, the radius is 3.

Then multiply the the radius by the radius, so 3x3 once you get that, multiply the answer by pi. Pi= 3.14, so if you do 3x3x3.14 you should get 28.26. Hope this helps.

3 0

2 years ago

−3x + 2 ≥−1 in a number line

Ksivusya [100]

Answer:

Given, 3x−2<2x+1

⇒3x−2x<1+2

⇒x<3orx∈(−∞,3)

The lines y=3x−2 and y=2x+1 both will intersect at x=3

Clearly, the dark line shows the solution of 3x−2<2x+1.

Step-by-step explanation:

4 0

2 years ago