Mathematics 27 Online
OpenStudy (anonymous):

Ok I am lost, When it comes to factoring, I can factor the first part and the last part but how do I check the math to make sure I am getting the correct middle? Factoring 30v^2+19v-63

OpenStudy (anonymous):

try out combinations which give you the middle one. you'll get better at spotting patterns as you practice

OpenStudy (anonymous):

how????

OpenStudy (anonymous):

30 is 15 x 2 = 3x5x2 63 = 7x9 =7x3x3 the combination you are looking for is 54 -35

OpenStudy (anonymous):

the most straightforward way is write out all the combination of integers, whose multiplication is -30*63. there are not so many of them. then test the sum of which pair gives 19. then you can find out the rest.

OpenStudy (anonymous):

when it comes to multiplication of the bigger numbers, quite often it is not as easy to get the right combination easily... it is better to just write out all of them, test one by one.

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