Trigonometry
posted by Zady .
How do you solve these equations algebraically?
y=x^2+4x
2xy=1
y=x^2+2x+3
x+y=1

I would use substitution. For instance, the first:
y= x^2+4x
2x (x^2+4x)=1
x^22x+1=0
(x1)(x1)=0
x=1 y=5
Respond to this Question
Similar Questions

math b
solve each system of equations algebraically: x^2+y^2=18 x+y=4 
Triginometry
Solve the following equations algebraically and check. y=2x^2+2x+3 y=x+3 
Geometry
How do solve the equations algebraically? 
Math
solve the equations algebraically x^2 + y^2 = 25 3y  4x = 0 
Math
1/2z  1/4w = 1/6 1/2z + 1/4w = 1/6 Solve the system of equations algebraically. 
Trigonometry
How do you solve this systems of equations algebraically? 
PreCalculus/Trigonometry
Solve the following system of equations algebraically. Verify your solution by using matrices. 3xy=0 5x+2y=22 
PreCalculus/Trigonometry
Solve the following system of equations algebraically. Verify the solution by using matrices. 8x2y=5 12x+3y=7 
Pre Calculas
7. For the function defined by: f(x)= {x^2, x<=1} {2x+1, x>1} a. evaluate f(0) 8. Solve the following system of equations algebraically. Verify your solution either graphically or by using matrices. 3xy=0 5x+2y=22 9. Solve the … 
math homework
solve the system of equations algebraically for x and y { x^2 + y^2 = 26 x + y = 6 a. (1,5) (1,4) b. (4,5) (5,4) c. (5,1) (5,1) d. (1,5) (5,1) e. no solution