SOLUTION: Graph quadratic equation graphically, symbolically, and numerically. to the nearest tenth when appropriate. x^2 - 225 = 0

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: Graph quadratic equation graphically, symbolically, and numerically. to the nearest tenth when appropriate. x^2 - 225 = 0      Log On


   

Question 412494: Graph quadratic equation graphically, symbolically, and numerically. to the nearest tenth when appropriate.
x^2 - 225 = 0
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

symbolically (by factoring):

x%5E2+-+225+=+0

x%5E2+-+15%5E2=0+

%28x+-15%29%28x%2B15%29=0+

x = +-15+

numerically (using table):
x | y |x%5E2+-+15%5E2=0+
0 | -225 |0%5E2+-+15%5E2=-225+
15 | 0 |15%5E2+-+15%5E2=225-225=0+
10 | -125 |10%5E2+-+15%5E2=100-225=-125+
20 | 175 |20%5E2+-+15%5E2=400-225=175+

graphically
+graph%28+500%2C+500%2C+-250%2C+255%2C+-250%2C+250%2C+x%5E2+-+225%29+