Question
Solve algebraically:
x^2 + y^2 = 18
x - 2y = -3.
Thanks.
x^2 + y^2 = 18
x - 2y = -3.
Thanks.
Answers
Steve
just substitute, since x=2y+3:
(2y+3)^2 + y^2 = 18
Solve that for y, and then x=2y+3
(2y+3)^2 + y^2 = 18
Solve that for y, and then x=2y+3