Question

Solve the system of equations algebraically show all of your stepsy=x^2+2xy=3x+20is it x=2.8 and y=28.5?

Answer 1

y=x^2+2x -----> equation A

y=3x+20 -----> equation B



substitute equation B in equation A

so

3x+20=x^2+2x

solve for x

x^2+2x-3x-20=0

x^2-x-20=0

Solve the quadratic equation