mjk369 mjk369
  • 04-03-2016
  • Mathematics
contestada

X^2 + y^2=40 and y=x-4 solve this simultaneous equation

Respuesta :

Аноним Аноним
  • 04-03-2016
Write x-4 instead of y.
x²+(x-4)²=40
x²+x²-8x+16=40
2x²-8x-24=0
x²-4x-12=0
(x-6)(x+2)=0
x=6 or x=-2

for x=6, y=6-4 = 2
for x=-2, y=-2-4 = -6
Answer Link

Otras preguntas

Solve for x and explain your steps in detail using the R-E-S-T Method 8x - 4 = 92
What is the vertex of f(x)=x2−8x+15 ?
write the name of the figure in the box that describes its properties. Some names will be used more than once. words: 1. rectangle 2. rhombus 3. sqaure
A buyer has a 30 year, $750,000 loan with a 5. 75% interest rate. How much is the first monthly payment?
A high-stress job, overcrowding, and long commutes to work are examples of the way some psychologists conceptualize stress as a ________.
Let's Check In What is the definition of "universal theme"?
If the activity of a radionuclide decreases from 5,000 disintegrations per minute to 625 disintegrations per minute in 12 hours, its half-life is?
When patterning a shotgun, what is a sufficient percentage of pellets within a 30-inch circle?.
PLEASE HELP! YOU MUST ADD THREE ANSWERS TO EACH BOX! IF YOU ANSWER PLEASE EXPLAIN HOW TO DO IT! WILL GIVE BRAINLIEST! NO LINKS!
One angle of a parallelogram measures 20 what are the measures of the other three angles in the parallelogram