Asked by danni
find all solutions of the system.
y+x^2=-5x
y-5x=25
y+x^2=-5x
y-5x=25
Answers
Answered by
Reiny
from the 2nd:
y = 5x + 25
sub into the first
5x+25 + x^2 = -5x
x^2 + 10x + 25 = 0
(x+5)^2 = 0
x+5 = 0
x = -5
then y = 5(-5) + 25 = 0
y = 5x + 25
sub into the first
5x+25 + x^2 = -5x
x^2 + 10x + 25 = 0
(x+5)^2 = 0
x+5 = 0
x = -5
then y = 5(-5) + 25 = 0
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