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thisisarri
 one year ago
Solve x2 − 3x = 28. HELP ME (:
thisisarri
 one year ago
Solve x2 − 3x = 28. HELP ME (:

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modphysnoob
 one year ago
Best ResponseYou've already chosen the best response.1x^2 3x=28 x^23x28=0 factor (x )(x )=0 think of two number that add up to 3 and multiply to 28

modphysnoob
 one year ago
Best ResponseYou've already chosen the best response.1what two number multiples to be 28?

thisisarri
 one year ago
Best ResponseYou've already chosen the best response.0ok, one second. @modphysnoob

modphysnoob
 one year ago
Best ResponseYou've already chosen the best response.1yep, 7+4=3 7*4=28

thisisarri
 one year ago
Best ResponseYou've already chosen the best response.0haha thanks @nader1

modphysnoob
 one year ago
Best ResponseYou've already chosen the best response.1so you'd get here (x7)(x+4)=0 from here , we can deduce that x=7,4
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