kinleyyangchen kinleyyangchen

24-04-2020
Mathematics

contestada

x2 + 8x = 15 help me

Respuesta :

Аноним Аноним

24-04-2020

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

Answer Link

chibueze1790 chibueze1790

24-04-2020

Answer:1.5

Step-by-step explanation:10x=15

x=15/10

x=1.5

Answer Link

Otras preguntas

How does Pippi's story about Hai Shang and Peter end? A. Peter dies and a swallow lays an egg in the nest. B. Hai Shang dies and Peter eats meatballs. C. Pe

which river is Old Fort Jackson located on?

Where is the homeland of the Burgundians

The vertices of a right triangle are (6, 2), (–2, –4), and (–2, y). What is the value of y? A. –4 B. –2 C. 2 D. 4

What is the name of one state that borders Mexico

Write 258/300 as a decimal and as a percent.

The quotient of a number and 4 decreased by 10 is 2

Let f(x) =4x-1 and g(x) = 2x^2 + 3 (fg)(x) , f/g(x), g/f(x)

Which of the following does not accurately describe the Medicis? A. They thought a monarchy was the best form of government. B. They were the most powerful fa

why was Old Fort Jackson built