Posted by **Mandy** on Monday, February 28, 2011 at 10:28pm.

By what amount does the sum of the roots exceed the product of the roots of the equation (x-7)(x+3)=0?

I have no idea what to do!

- Alg 2 -
**jai**, Tuesday, March 1, 2011 at 1:48am
first get the roots,,

(x-7)(x+3)=0

thus equating each term inside the parenthesis to zero,

x-7=0 and x+3=0

therefore, x=7 and x=-3

the roots are 7 and -3

sum: 7 + (-3) = 4

product: 7(-3) = -21

the questions asks for the difference between the sum and product, therefore:

4 - (-21) = 25

hope this helps~ :)

## Answer This Question

## Related Questions

- Algebra - Given the roots, 1/2 and 4, find: (A) The quadratic equation 2x^2-9x+4...
- amath - The roots of the quadratic equation x^2-mx+n=0 ,where m and n are ...
- Algebra - The equation x^2+px+q=0, q cannot be equal to 0, has two unequal roots...
- Alg II - I'm working with finding roots of polynomial equations with degrees of ...
- Alg II - I'm working with finding roots of polynomial equations with degrees of ...
- Math - 1. The expression log 5x is equivalent to 2. Write the equation of a ...
- Adv algebra - The equation x^2+px+q=0, q cannot be equal to 0, has two unequal ...
- Math - The equation x^2+px+q=0, q cannot be equal to 0, has two unequal roots ...
- Edge ah am us ,maths - if the sum of the roots and product of the roots of ax^3-...
- math - If the sum of the roots of 2 x squared - 6 x + 7 equals zero is ...

More Related Questions