Wednesday

October 22, 2014

October 22, 2014

Posted by **toni** on Tuesday, October 8, 2013 at 2:02pm.

3x^2 +21x=0

is the root 7

- algebra -
**Reiny**, Tuesday, October 8, 2013 at 2:52pmfactor it

3x(x+7) = 0

so

3x=0 or x+7=0

x = 0 or x = -7

**Answer this Question**

**Related Questions**

algebra - 1.)correct 2.)wrong---> the first term is wrong 4(3a^2)^2 = 36a^4 3...

Algebra - I had to solve the function g of f where f is x^2+1 and g is sq. root ...

Algebra - I had to solve 2x^2-x-1 using the quad. formula. I got it down to (1...

Algebra - Use the quadratic formula to solve the equation. Give exact answers: ...

algebra - 1)Write the expression 9n^6+7n^3-6 in quadratic form,if possible A.9(n...

Math - 1) Solve equation 3r+5 _____ + 2 = 2r to find the value of r? 2 A. 2 1/7 ...

Algebra - Rationalize each expression by building perfect nth root factors for ...

Algebra - Can you explain how to find the solution of 3x^2-2x+5, using the ...

Advanced Algebra - Can you please explain to me how I can solve these problems...

algebra 2 - Not sure if either one of these answer are correct to simplify the ...