SOLUTION: I need to solve algebraically, then graph. Should I solve by elimination or substitution? Either way I'm running into a lot of mumbo jumbo. Your help and/or hints are greatly ap
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Question 79579: I need to solve algebraically, then graph. Should I solve by elimination or substitution? Either way I'm running into a lot of mumbo jumbo. Your help and/or hints are greatly appreciated!
X^2 - 4Y^2 = 16
2Y - X = 2
Found 2 solutions by elektrisitee, Earlsdon:
Answer by elektrisitee(1) (Show Source): You can put this solution on YOUR website!
use substitution making it x^2=4y^2+16
then you take the sqare root of the right side
so that x=2y+4
then, you plug x into the other equation.
Answer by Earlsdon(6294) (Show Source): You can put this solution on YOUR website!
Solve this system of equations: I would use substitution.
1)
2) Write this as:
2a) Now square both sides. and substitute into equation 1).
Remove the parentheses (Remember to change the signs of the terms inside the parentheses!)
Simplify.
Add 4 to both sides.
Divide both sides by -4.
Now substitute this into equation 2a) and solve for y.
2a)
Divide both sides by 2.
The solution is: (-5, -3/2)
Check:
=
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