Question

Attempt

Using the Formula I got4

Is my answer correct?

Printable View

- April 5th 2009, 10:16 AMmj.alawamisolution of the quadratic equation
**Question**

**Attempt**

Using the Formula I got**4**

Is my answer correct? - April 5th 2009, 10:23 AMstapel
From what you learned about

**factoring quadratics**and**special factoring formulas**, you know that the above can be restated as:

. . . . .

What result do you get when you**solve the factors**? (Wink)

**The Quadratic Formula**gives a result (using a = 1, b = 0, and c = -4) that agrees with the "by factoring" result. What formula did you use?

Note: The answer to any "solving" problem can be checked by plugging it back into the original exercise. In your case:

. . . . .

:D - April 5th 2009, 10:27 AMmj.alawami
- April 5th 2009, 10:31 AMmj.alawami
- April 5th 2009, 10:34 AMJhevon
no

and the purpose of adding zero to the left side was...?

-4 is your constant term, that is the "c" in your formula. thus you have a = 1, b = 0 and c = -4

applying the quadratic formula, we have

for problems like these, the quadratic formula is overkill. either do what**stapel**did, or just add 4 to both sides and then square root both sides (and remember that the right side will have a +/- with it, since there are two square roots to a number)