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Mathematics 8 Online
OpenStudy (anonymous):

(x+2)(x-7)>0 I got (-2, 7) but it says its wrong?

jimthompson5910 (jim_thompson5910):

(x+2)(x-7)=0 what are the solutions to the equation above?

OpenStudy (anonymous):

-2 and 7?

jimthompson5910 (jim_thompson5910):

Draw out a number line with 0 in the middle |dw:1412220530445:dw|

jimthompson5910 (jim_thompson5910):

then plot x = -2 and x = 7 on this number line |dw:1412220563713:dw|

jimthompson5910 (jim_thompson5910):

at these points, the expression (x+2)(x-7) is 0 |dw:1412220596286:dw|

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