Question

Solve the following system algebraically.

y = x2 +x
y = -x - 1


A) (-2,3)
B) (-1,0)
C) (0,0)
D) (-5,2)

Answer 1

B

Explanation:

-x - 1 = x^2 + x

x^2 + 2x + 1 = 0

(x+1)(x+1) = 0

x = -1 (double soution)

y = 1-1 =

y =0

(-1,0) = double solution