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careoh
 3 years ago
How to find the SUM of the solution of the equation:
8x^2+40x=16x
careoh
 3 years ago
How to find the SUM of the solution of the equation: 8x^2+40x=16x

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SmoothMath
 3 years ago
Best ResponseYou've already chosen the best response.18x^2 + 40x = 16x (16x) 8x^2 + 32x = 0 8x(x + 4) = 0 I'll let you take it from here.

patbatE21
 3 years ago
Best ResponseYou've already chosen the best response.0Set 8x = 0 and (x +4) = 0 , then the results add together

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

careoh
 3 years ago
Best ResponseYou've already chosen the best response.0Thanks! How did you get 32x?

SmoothMath
 3 years ago
Best ResponseYou've already chosen the best response.1By 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

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

SmoothMath
 3 years ago
Best ResponseYou've already chosen the best response.1Yes. Haha thank you for catching that.

careoh
 3 years ago
Best ResponseYou've already chosen the best response.0So after, do you divide each by 8?

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

careoh
 3 years ago
Best ResponseYou've already chosen the best response.0So the answer would be 3?

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

patbatE21
 3 years ago
Best ResponseYou've already chosen the best response.0you 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

careoh
 3 years ago
Best ResponseYou've already chosen the best response.0That was easy! Thanks you guys!
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