# find the missing factor

• March 16th 2006, 09:46 PM
jim1174
find the missing factor
how do i do this problem

find the missing factor 7m2 times (?) = 35m8 -28m5 -42m2
• March 17th 2006, 08:40 AM
ThePerfectHacker
Quote:

Originally Posted by jim1174
how do i do this problem

find the missing factor 7m2 times (?) = 35m8 -28m5 -42m2

I understand the problem as,
$7m^2 (?)=35m^8-28m^5-42m^2$
On the right side you get $35m^8$ thus, which number when multiplied by $7m^2$ gives $35m^8$? The answer is $5m^6$. Now on the right side you also have $-28m^5$ now which number when multiplied by $7m^2$ gives $-28m^5$? The answer is $-4m^3$. Now on the right side you also have $-42m^2$ now which number multiplied by $7m^2$ gives $-42m^2$? The answer is $-6$ Thus, you have,
$7m^2(5m^6-4m^3-6)=35m^8-28m^5-42m^2$
$5m^6-4m^3-42$
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