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About Sherman D.
Expertise
I can answer questions dealing in mathematics of all kinds except for Physics and Calculus, but i can answer questions in Pre-Calculus and Chemistry. I can also answer questions in Recipes of all kinds. I can find games cheats/walkthroughs, but i can`t find a specific game online or offline. I can also do history and recipes for alcoholic beverages.

Experience
Mathematics, Recipes, History, and Games.

Education/Credentials
High School graduated. I graduated with honors, and i was in Beta Club for a year and a half.

Awards and Honors
Principle's list and A and B honor roll in high school only.

You are here: Experts > Science > Mathematics > Advanced Math > Mathematics

Topic: Advanced Math

Expert: Sherman D.
Date: 6/16/2008
Subject: Mathematics

Question
hallo sirim form malaysia.. i have a qustion and i dont know how to solve this, can you factorize this equation? X^2 - 28Z - 480 = 0

thank you sir

Answer
if you mean x^2 - 28x - 480 = 0, then

x = (-b ± sqrt(b^2 - 4ac))/(2a)

x = (-(-28) ± sqrt((-28)^2 - 4(1)(-480)))/(2(1))
x = (28 ± sqrt(784 + 1920))/2
x = (28 ± sqrt(2704))/2
x = (28 ± 52)/2
x = (80/2) or (-24/2)
x = 40 or -12

so in factored form that would be

(x - 40)(x + 12)

you can also go to www.quickmath.com and it will factor it for you.

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