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SmoothMathBest ResponseYou've already chosen the best response.1
8x^2 + 40x = 16x (16x) 8x^2 + 32x = 0 8x(x + 4) = 0 I'll let you take it from here.
 one year ago

patbatE21Best ResponseYou've already chosen the best response.0
Set 8x = 0 and (x +4) = 0 , then the results add together
 one year ago

SmoothMathBest ResponseYou've already chosen the best response.1
Correct, since it asks for the sum. You get two results, one from either factor.
 one year ago

careohBest ResponseYou've already chosen the best response.0
Thanks! How did you get 32x?
 one year ago

SmoothMathBest ResponseYou've already chosen the best response.1
By subtracting 16x from both sides and then grouping like terms. Like this: 8x^2 +40x = 16x 8x^2 +40x 16x = 16x16x 8x^2 +32x = 0
 one year ago

careohBest ResponseYou've already chosen the best response.0
So you subtracted 16x16x, do you also subtract 40x16x? If so, wouldn't that equal 24x?
 one year ago

SmoothMathBest ResponseYou've already chosen the best response.1
Yes. Haha thank you for catching that.
 one year ago

careohBest ResponseYou've already chosen the best response.0
So after, do you divide each by 8?
 one year ago

SmoothMathBest ResponseYou've already chosen the best response.1
Yeah. I get 8x^2 + 24x = 0 and you can take out a factor of 8x
 one year ago

careohBest ResponseYou've already chosen the best response.0
So the answer would be 3?
 one year ago

SmoothMathBest ResponseYou've already chosen the best response.1
You get a factor of (x+3) What x makes that factor 0?
 one year ago

patbatE21Best ResponseYou've already chosen the best response.0
you can factor out as 4x(2x+6) then set both to zero and you should end up with x= 0 & x = 3 and add them
 one year ago

careohBest ResponseYou've already chosen the best response.0
That was easy! Thanks you guys!
 one year ago
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