Question

Can someone walk through this with me and teach me how to do this.

how do I solve
y^2 + x ^2 = 40000
y = 5x + 2
using the substitution method

Answer 1

substitute y for 5x+ 2 in the first equation

Answer 2

(5x+2)^2 + x^2 = 40000

Answer 3

(25x^2 + 10x +10x +4) + x^2

Answer 4

25x^2 + 20x + 4 + x^2

Answer 5

combine like terms so then its 26x^2 + 20x + 4 = 4000

Answer 6

okay I'm following you, whats the next step

Answer 7

@chrisvillasmil

Answer 8

well now you have to solve for x

Answer 9

so you subtract 4 from both sides

Answer 10

wait

Answer 11

ok i got it lol

Answer 12

so you have to plug in the values you have into the quadratic formula