Posted by
meteka on
.
solve the system of equations
y = x + 4
y = x^2 + 9x +16

math 
Kuai,
x^2 + 9x +16 = x + 4
x^2 + 9x x + 16  4 = (x+4)
x^2 + 8x + 12 = 0
(x +2)(x+6) = 0
solve for x
x + 22 = 0 2
x = 2
x  6 6 = 06
x = 6
(2, 2), (6 ,2)

math 
Kuai,
Typo
x + 6 6 = 06
x = 6