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

Most new workers in the labor force are men. Please select the best answer from the choices provided OT OF
Cada vez que miro un mural, me acuerdo de mi padre y recuerdo nuestras peleas sobre mi carrera. ¿Cómo (1) (reaccionar) mi padre si supiera que yo quería ser mur
Which summit is the highest mountain peak? A. Mount Whitney. B. Mount Rainier. C. Pikes Peak or D. Mount Shasta?
One of the same side angles of two parallel lines is 20° smaller than the other one. Find the measures of these two angles.
Help me!!! I am so confused
how many voices do latin verbs have? a. two b. four c. six d. eight
What is the full form of FIFA?​
A 100-kg moving at 15 m/s collides with a 50-kg cart at rest causing both cars to move together in the same direction. If momentum is conserved, at what speed a
Find k and the roots if 3x^2+kx+4=0 and the sum of the roots is 3
A classroom is 24 metres long and 21 metres wide. Find the area of the classroom​