3 years ago

Solve this quadratic equation by completing the square.

Mathematics

1 answer:

erastova [34]3 years ago

5 0

Answer:

Step-by-step explanation:

x² + 6x = 18

To complete the square, take the coefficient of the x term, halve it, square the result, then add to both sides.

(6/2)² = 3² = 9

x² + 6x + 9 = 18 + 9

(x + 3)² = 27

x + 3 = ±√27

x = -3 ± √27

You might be interested in

Find the percent of change from 24°F to 39°F. Then state whether the percent of change is an increase or a decrease.

lara31 [8.8K]

Answer:

24F is a increase I belive and 39F is a decrease

4 0

3 years ago

A sphere is inscribed in a cylinder. The surface area of the sphere and the lateral area of the cylinder are equal. true or fals

Volgvan

It is true that the surface area of the sphere and the lateral area of the cylinder are equal. The answer is True.

8 0

4 years ago

Read 2 more answers

Suzannah made 7 bows. How many feet of ribbon did she use?

ella [17]

Answer:

420

Step-by-step explanation:

5 0

3 years ago

An octagon has a perimeter of 28 units. What is the perimeter of the image of the octagon after the translation (x,y) → (x-7,y+

kow [346]

Answer:

https://www.caverna.k12.ky.us/userfiles/110/Classes/7142//userfiles/110/my%20files/study%20guide%20answer%20key%20(1).pdf?id=4059

Step-by-step explanation:

copy and past this pdf

6 0

3 years ago

Ms.Phillips ordered 56 pizzas for a school fundraiser. Of the pizzas ordered, 2/7 of them were pepperoni, 19 were cheese, and th

larisa [96]

$\frac{2}{7}$ • 56 = 16

so 16 pizzas are pepperoni

19 pizzas are cheese

And the rest is Veggie

So now add 16 and 19 which is 35

Now subtract that from 50 which is 15

So 15 pizzas were Veggie pizzas

5 0

3 years ago

Read 2 more answers