SOLUTION: Can I please have your assistance? Solve the system: y = x2 - 4, y = 3x -6

Algebra ->  Systems-of-equations -> SOLUTION: Can I please have your assistance? Solve the system: y = x2 - 4, y = 3x -6      Log On


   

Question 1042298: Can I please have your assistance? Solve the system: y = x2 - 4, y = 3x -6
Answer by josgarithmetic(39625) About Me  (Show Source):
You can put this solution on YOUR website!
You can do your others using Matrix, Elimination, or Substitution. This one, you might want to use Substituion.

Substitute expression for y from one equation into the other equation.

y=x%5E2-4
3x-6=x%5E2-4-----the substitution
3x-6-x%5E2%2B4=0
-3x%2B6%2Bx%5E2-4=0
x%5E2-3x%2B6-4=0
x%5E2-3x%2B2=0---------USE FACTORIZATION AND ZERO-PRODUCT RULE.