Friday

July 25, 2014

July 25, 2014

Posted by **tommy** on Thursday, October 3, 2013 at 11:00pm.

find the root(values of x when the expression is equal to zero)

3x^2+21x=0

- algebra -
**Steve**, Friday, October 4, 2013 at 5:42am3x^2+21x = 0

3x(x+7) = 0

if the product of factors is zero, then one of the factors must be zero. So, when is any of the factors zero?

**Related Questions**

algebra - could someone please check these roblems for me and if they are not ...

maths - Consider the quadratic equation m^2 x^2 + 2(2m-5)x + 8 = 0 a) If 2 is a ...

Algebra - Hello Reiny, please check these problems for me and if they are not ...

maths - Consider the quadratic equation m^2 x^2 + 2(2m-5)x + 8 = 0 a) If 2 is a ...

algebra - The point of intersection of the graphs of the equations of the ...

Math PLEASE HELP ASAP - -PLEASE INCLUDE SOLUTIONS AND EXPLAIN HOW YOU DID IT ...

Algebra - For what values does the sqr root of 2x = x square root 2 ?

Algebra - for the matrix: { 1 -2 0} {-2 -1 1} { 0 0 -1} I found the eigenvalue ...

math: polynomials - Please help me with these three problems! 1. solve for x: 3x...

Algebra - Please Simplify: Root 18-Root 50+4 Root 2 = ?