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Mathematics 8 Online
OpenStudy (anonymous):

Factor 5x^2 + 35X Please explain how to check by multiplication, thanks!

OpenStudy (amistre64):

check by multilplication? umm ... multiply them back after you factor?

OpenStudy (amistre64):

5x (x^2+7) is the factors right?

OpenStudy (amistre64):

x^2 + 7 5x --------- 5x^3 +35x

OpenStudy (anonymous):

I got 5x(x+7) ?????

OpenStudy (anonymous):

I do not understand how you check it by multiplication ?

OpenStudy (amistre64):

if i asked you to multiply 27 by 3, what would you do?

OpenStudy (amistre64):

its the same process. multiplication doesnt cahnge simply becasue we rewrite how a number looks

OpenStudy (amistre64):

20+7 times 3

OpenStudy (amistre64):

if you got: 5x(x+7), lets multiply them back together to check it out x +7 5x --------- 5x^2 +35x

OpenStudy (anonymous):

Okay thanks, I understand now. I will need to practice this a lil more, I guess I over thought it

OpenStudy (amistre64):

lol ... it was the form that threw you most likely. Multiplication itself is just multiplication :)

OpenStudy (anonymous):

Lol yea :)

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