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anonymous
 5 years ago
Does anyone know how to factor trinomials completely? I need to factor: 20a  2a^  18 completely. Here is what I have so far: 2(10A  a^ 9). What do I do next? The solution is: 2(a  9)(a  1) but I cannot figure out how to get there.
anonymous
 5 years ago
Does anyone know how to factor trinomials completely? I need to factor: 20a  2a^  18 completely. Here is what I have so far: 2(10A  a^ 9). What do I do next? The solution is: 2(a  9)(a  1) but I cannot figure out how to get there.

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0you need to put the a^2 term first

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0I understand I need to put the a ^ 2 first, but I don't understand WHY I need too?? How do you know to put the a ^2 first?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.02a^2 + 20a  18 factor out a 2 2(a^2  10a + 9) you need factors of 9 that add to get 10  9 and 1 2(a  9)(a  1)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.02(a^210a+9)=0 (a9)(a1)=0 a=1,9

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0the form of a quadratic is ax2+bx+c

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Think about... what 2 numbers times each other equals 9 and added together equals 10.. Also always make sure the a^2 term is positive so it will make the factoring very easy
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