Factorize: 3a(b^2)(c^2)-127(a^3)
i try to factorize it into the following steps
3a(b^2)(c^2)-147(a^3)+20(a^3)
3a[(bc)^2-(7a)^2]+20(a^3)
3a(bc+7a)(bc-7a)+20(a^3)
a[3(bc+7a)(bc-7a)+20(a^2)] <---- is this fully factorized? [Yes/No]
2)
a^2+b^2=6ab, find the possible value(s) of (a+b)/(a-b) <---plz HELP!!!!
更新1:
if the first question's answer is NO, please give the correct steps and answer, thx a lot!!
更新2:
But did you copy the question correctly? The answer looks a bit odd. its so odd, that is why i need to ask ma!>< how do you make (^2) directly?
