algebra 2
posted by jenny on .
Nonlinear homework...
Solve the system by elimination.
1)y=x^2+2
4xy=10
2) Solve the system using substitution.
Y=3x^2+x2
Y=5x+3

1)
add them the way they sit
4x = x^2 + 12
x^2 + 4x + 12 = 0
I would complete the square:
x^2 + 4x + 4 = 12 + 4
(x+2)^2 = 8
x+2 = ± √8 = ± 2√2 i
x = 2 ± 2√2 i
for 2)
you would get
5x+3 = 3x^2 + x  2
3x^2  6x + 5 = 0
give it a shot...... (use the formula)