Wednesday

October 22, 2014

October 22, 2014

Posted by **Sally** on Sunday, May 23, 2010 at 7:38pm.

x^2+4x-21=0

- math/trigonometry -
**Libby**, Sunday, May 23, 2010 at 8:42pmhalve the middle term, then square it, then balance the equation by adding it to one end of the = side and subtracting it from the other. Then get everything over to the left side so you have 0 left again on the right side, simplify, and factor. After factoring, take the two bubbles and set each equal to zero. This is how you get two numbers. Check your answers to make sure both of them work, because sometimes only one works.

**Answer this Question**

**Related Questions**

Algebra - Which of the following statements is true? A. Any quadratic equation ...

maths - Consider the equation x(square) + 4px + 2q = 0 where p and q are real ...

Math - I need help with these three problems. They are on a Study Guide and I ...

math - I need help with these three problems. They are on a Study Guide and I ...

Math - I need help with these three problems. They are on a Study Guide and I ...

Algebra 2 - Completing the square method allows you to solve any quadratic ...

Math - Hi everyone. Would someone be able to help me with this problems? I know ...

math - i need to solve this equation by completing the square: x^2-14x+1=0 i don...

Math - Solve the equation by completing the square. 2x^2 + 9x + 1 = 0

math - solve the equation by completing the square: x^2-9x-2=0