3 years ago

What number should be added to both sides to complete the square? x^2 + 8x = 4

Mathematics

1 answer:

son4ous [18]3 years ago

8 0

Answer:

Step-by-step explanation:

x² + 8x = 4 ⇔ x² + 8x + 16 = 4 + 16 ⇔ x² + 2×4x + 4² = 20 ⇔ (x + 4)² = (2√5)²

Remark : (2√5)² = 20

You might be interested in

Yesterday, Michelle's Snack Shack went through 3 3/5 bottles of ketchup. If they used 1 3/10 times as much mustard as ketchup, h

Dima020 [189]

Okay. To find the answer to this question, let's multiply both fractions together. 3 3/5 as an improper fraction is 18/5 and 1 3/10 as an improper fraction is 13/10. Multiply straight across to get the values. 18/5 * 13/10 is 234/50 or 4 17/25 in mixed number form. Michelle's Snack Shack went through 4 17/25 bottles of mustard.

4 0

3 years ago

A box of cereal contains 18 cups. Ben eats 2 1/4 cups every serving. How many servings can he eat?

g100num [7]

Ben can have 8 servings total!

Hope this helps! :)

4 0

4 years ago

The Spotlight on Teaching and Learning at the beginning of this chapter discusses the emphasis in the Common Core State Standard

ivanzaharov [21]

I don't know this question

3 0

3 years ago

Dana says that all even numbers are composite. Is she correct?

Ksenya-84 [330]

Answer:

yes

Step-by-step explanation:

all even numbers greater than two are composite numbers

8 0

3 years ago

5y - 25x =10 I need someone to help me solve this asap

ruslelena [56]

Answer:slope=10.000/2.000=5.000

x-intercept=2/5=minus 0.40000

y-intercept=2/1=2.00000

Step-by-step explanation:

8 0

3 years ago