# SOLUTION: Ok, some of these types of problems, for example {{{3x^4-81x}}}, I understand, but in {{{16a^4-2a}}}, I don't get it. I know you're supposed to factor out the GCF, but I'm lost. He

Algebra ->  -> SOLUTION: Ok, some of these types of problems, for example {{{3x^4-81x}}}, I understand, but in {{{16a^4-2a}}}, I don't get it. I know you're supposed to factor out the GCF, but I'm lost. He      Log On

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 Click here to see ALL problems on expressions Question 8434: Ok, some of these types of problems, for example , I understand, but in , I don't get it. I know you're supposed to factor out the GCF, but I'm lost. Help would be very appreciated. Found 2 solutions by drglass, khwang:Answer by drglass(89)   (Show Source): You can put this solution on YOUR website!Factor out 2a. This will give you If you are looking for then this factorization tells us that a = 0 and a = 1/2 are solutions. Answer by khwang(438)   (Show Source): You can put this solution on YOUR website! = 3x = 3x(x-3) [by using = (x-a) ] Why nobody pointed out the mistake of another solution? Kenny