Help me with this one plz !​

Need on this one asap im almost done with this subject

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1

Select the correct answer from each drop-down menu. a system of equations and its solution are given below. system a complete the sentences to explain what steps were followed to obtain the system of equations below. system b to get system b, the equation in system a was replaced by the sum of that equation and times the equation. the solution to system b the same as the solution to system a.]