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Mathematics 19 Online
OpenStudy (anonymous):

can somebody show me how to solve this |x - 3| = 4

OpenStudy (amistre64):

you have to solve it twice

OpenStudy (amistre64):

|4| = 4 and |-4| = 4 so we have to look for 2 results

OpenStudy (amistre64):

x-3 = 4 and x-3 = -4

OpenStudy (anonymous):

so how do i do that

OpenStudy (amistre64):

how do you do WHAT?

OpenStudy (anonymous):

solve twice

OpenStudy (amistre64):

by setting up to equations and solving each one in its own right

OpenStudy (amistre64):

to means two

OpenStudy (anonymous):

can you show me how to do that

OpenStudy (amistre64):

i already did ....

OpenStudy (amistre64):

youll have to be more specific as to where the confusion lies ....

OpenStudy (anonymous):

i just dnt get it at all

OpenStudy (anonymous):

|x|=x when x>0 |x|=-x when x<0 so in here the use of modulus function means that there are two possible answers x-3=4 && -(x-3)=4 x=7 && x=-1

OpenStudy (anonymous):

thank yhall

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