Ask your own question, for FREE!
Mathematics 16 Online
OpenStudy (clamin):

PLEASE HELP!!! MEDAL!! Subtract the rational expression:::

OpenStudy (clamin):

|dw:1421976209865:dw|

OpenStudy (bibby):

before you can subtract fractions, you have to get them into a common base

OpenStudy (solomonzelman):

`\(\large\color{slate}{ \displaystyle \frac{2}{x-3} - \frac{1}{x+7} }\) ` latex for future reference, if you want.

OpenStudy (misty1212):

HI!!

OpenStudy (misty1212):

\[\frac{a}{b}-\frac{c}{d}=\frac{ad-bc}{bd}\] is the one true way to subtract so for you it is \[\huge \frac{2(x+7)-1(x-3)}{(x+7)(x-3)}\]

OpenStudy (misty1212):

all the work is in the numerator, you gotta multiply out and combine like terms as the math teachers say

OpenStudy (clamin):

why do they switch?? the (x+7) is supposed to be on 1

OpenStudy (bibby):

no it isn't. \(\large \frac{2}{\cancel{x-3}}*(\cancel{x-3})*(x+7)\)

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!