b) \(125x^3+27y^3=\left(5x\right)^3+\left(3y\right)^3\)
\(=\left(5x+3y\right)\left(25x^2-15xy+9y^2\right)\)
c) \(27-y^3=3^3-y^3=\left(3-y\right)\left(9+3y+y^2\right)\)
e)\(125+x^3=5^3+x^3=\left(5+x\right)\left(25-5x+x^2\right)\)
g)\(x^3+216y^3=x^3+\left(6y\right)^3=\left(x+6y\right)\left(x^2-6xy+36y^2\right)\)
h)\(x^3-343y^3=x^3-\left(7y\right)^3=\left(x-7y\right)\left(x^2+7xy+49y^2\right)\)
i)\(125-27y^3=5^3-\left(3y\right)^3=\left(5-3y\right)\left(25+15y+9y^2\right)\)
câu d bạn có ghi sai đề ko
thiếu mũ của x ấy
a, 8x\(^3\)+ 6\(^4\)
= 2\(^3\)x\(^3\)+2\(^4\)3\(^4\)
=2\(^3\) \(\left(x^3+2.3^4\right)\)
=8 \(\left(x^3+162\right)\)