SOLUTION: I do not understand how to do the Quadratic Equation r2(squared) + 10r + 9 =0

SOLUTION: I do not understand how to do the Quadratic Equation r2(squared) + 10r + 9 =0

Algebra.Com

Question 8347: I do not understand how to do the Quadratic Equation r2(squared) + 10r + 9 =0
Answer by bonster(299) (Show Source): You can put this solution on YOUR website!
=0
what two numbers can you multiply to get the product 9, yet at the same time, has the sum of 10? 9 and 1

(r+1)(r+9)=0

When r+1=0
r=-1

When r+9=0
r=-9

RELATED QUESTIONS
Is -4x squared = 0 a quadratic equation? I am supposed to solve each quadratic equation... (answered by stanbon)

How do you solve the equation m - 2n = 9 if the domain is { -1, 0, 5}? Please help i... (answered by stanbon)

I need to solve these quadratic equations using the method that came from India. I am... (answered by solver91311)

I do not understand how to solve the following quadratic equation: 2x/x-3 + 1/x... (answered by josgarithmetic)

The quadratic equation is 2x2+6x=4. How do I set it to 0? Do I zero out something? By... (answered by MathLover1)

Ok, I am working on graphing the quadratic 5x^2+10x+2=0 but I do not full understand how... (answered by lwsshak3)

How do I solve the equation 1/R = 1/r1 + 1/r2 for... (answered by Fombitz)

Solve using the quadratic formula: 25x^2+30x+9=0 I do not understand this at all,... (answered by Alan3354)

How do you solve this quadratic equation??? x squared... (answered by Greenfinch,Theo)