3 years ago

X2 + 8x = 15 help me

Mathematics

2 answers:

dangina [55]3 years ago

5 0

Answer:1.5

Step-by-step explanation:10x=15

x=15/10

x=1.5

svlad2 [7]3 years ago

3 0

Answer:

x₁ = - 4 + √31

x₂ = - 4 - √31

Step-by-step explanation:

x² + 8x = 15

x² + 8x - 15 = 0

x = [- 8 ± √8² - 4×1×(-15)]/(2×1)

x = (-8 ± 2√31)/2

x₁ = (-8 ± 2√31)/2

x₁ = - 4 + √31

x₂ = - 4 - √31

You might be interested in

A seagull is 12 feet above the surface of the ocean. A fish is 3 feet below the surface of the water. How far apart are the seag

lara31 [8.8K]

Answer:

Step-by-step explanation:

12+3=15

4 0

2 years ago

Anyone could help with the answer?

tatuchka [14]

Step-by-step explanation:

sorry but i need points Thank you

7 0

3 years ago

Let x △ y be defined by x △ y=x−5y. What is the value of 3 △ (−4)

TEA [102]

$x\Delta y=x-5y\\\\3\Delta(-4)\qquad\text{put the values x = 3 and y = -4 to the expression x - 5y}:\\\\3\Delta(-4)=3-5(-4)=3+20=23$

5 0

3 years ago

Use the following function rule to find f(28).

IrinaVladis [17]

What following function tool?

7 0

3 years ago

Víctor claims that when 1/6 is divided by a fraction the result will always be greater than 1/6 find an example of a fraction th

Naddik [55]

Answer:

Step-by-step explanation:

Choose a random fraction less than 1. I will choose 1/4.

1/6 ÷ 1/4 = 1/6 × 4/1 = 4/6 = 2/3

2/3 > 1/6 so this example supports his claim.

Now chose a fraction greater than 1. I will choose 4/3

1/6 ÷ 4/3 = 1/6 * 3/4 = 3/24

3/24 < 1/6 so this contradicts his claim

6 0

2 years ago

X2 + 8x = 15 help me ​

X2 + 8x = 15 help me