Answer: A is
in standard form. |

zero-factor property:
If the product of two numbers is 0, then one of the numbers must be 0.
[If ab=0, then either a =0 or b = 0.] |

To solve a quadratic equation
1) Write the equation in standard form 2) Factor the quadratic equation 3) Use the zero-factor property |

Example 1
Solve: Either x - 3 = 0 or x + 4 = 0 and x = 3 or x = - 4 |
Example 2
Solve: ( x - 5)(x + 1) = 0 x = 5 or x = -1 |
Example 3
Solve: Standard Form is (2x - 3)(x + 2) = 0 or |