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Home > A2C > Chapter 12 > Lesson 12.1.3 > Problem 12-57


Ernie and Lisa were trying to find the roots of a quadratic function g(x) by solving g(x) = 0. Ernie's answer was . Lisa's answer was Without using a calculator, show that both answers are equivalent and figure out what their original quadratic function g(x) might have been.

Computer without a calculator.

Start with Lisa's answer and try to simplify it to look like Ernie's answer.

Use the quadratic formula to find a possible equation.