Question

сократите дробь a^3+27b^3 / a+3b

Answer 1

a^3+27b^3 / a+3b=(а+3b)(a^2+3ab+b^2)/a + 3b=a^2+3ab+b^2

Answer 2

a^3+27b^3/a+3b=(a^3+(3b)^3)/(a+3b)=(a+3b)(a^2-3ab+b^2)/(a+3b)=a^2-3ab+b^2