How much alcohol should be added to 40 ounces of a solution which is 25% alcohol
232
237
Ответы на вопрос:
1-a^4b^4=(1-a^2b^2)(1+a^2b^2) (2m-3n)^2-100n^2=(2m-3n-10n)(2m-3n+10n)=(2m-13n)(2m+7n) 4a^6-9a^2b^2=(2a^3-3ab)(2a^3+3ab)=a^2(2a^2-3b)(2a^2+3b) a^3c-ac^3=ac(a-c)(a+c)
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