paige7181 paige7181

20-06-2019
Mathematics

contestada

Please HELPP!!! Solve the system of equations.
y= 2x
y= x^2 - 15

Respuesta :

konrad509 konrad509

20-06-2019

[tex]y=2x\\y=x^2-15\\\\x^2-15=2x\\x^2-2x-15=0\\x^2-5x+3x-15=0\\x(x-5)+3(x-5)=0\\(x+3)(x-5)=0\\x=-3 \vee x=5\\\\y=2\cdot(-3) \vee y=2\cdot5\\y=-6 \vee y=10\\\\(x,y)\in\{(-3,-6),(5,10)\}[/tex]

Answer Link

Otras preguntas

seventy is 60% of what number?

How do I figure out these questions? Could you please teach me and give me examples? Examples with the answer and why it is would also be appreciated! 1) How ta

How to simplify 216k4

How did apartheid lead to social conflict in South Africa?

How did the missouri compromise divide the nation?

More math help please

How does quadrilaterals relate to triangles?

Which is a characteristic of a novel? Novels have only a few characters. Novels have simple, straightforward themes (and few of them). Novels are filled with gr

Which of the three people below was a Scottish missionary and explorer? A: David Livingstone B: Cecil Rhodes C: Benjamin Disraeli

Which word in the sentence is the direct object? Jenny gave her brother batteries for his new toy. A. batteries B. brother C. Jenny D. toy