Originally Posted by
eah1010 Once again, easy but i can't remember...sorry for another question but i think its my last one...
Solve the system of equations and check your answer(s). You may use any method to solve.
2x^2 - y = 8
7x + y = -4
I tried it this way:
y = -7x - 4
2x^2 - (-7x - 4) = 8
2x^2 + 7x + 4 = 8
2x^2 + 7x - 4 = 0
(2x -1) (x + 4) = 0
x = 1/2, -4
Now, when I plug in both values for x (because there were 2 values) seperate times i get values for y that don't check out when I check both values for x and y. HELP!!! Thank you so much!