Question

[Đinh thủy tiên]

Giải hộ mình câu 9 đến 16 bài 1 

Answer 1

[Trần Việt Linh]

9)\(x^6+216=\left(x^2\right)^3+6^3=\left(x^2+6\right)\left(x^4+6x^2+36\right)\)

10)\(x^2+12x+36=\left(x+6\right)^2=\left(x+6\right)\left(x+6\right)\)

11)\(9x^2-12xy+4y^2=\left(3x-2y\right)^2=\left(3x-2y\right)\left(3x-2y\right)\)

12)\(-25x^2y^2+10xy-1=-\left(25x^2y^2-10xy+1\right)=-\left(5xy+1\right)^2=-\left(5xy+1\right)\left(5x+1\right)\)

13)\(a^3-6a^2+12a-8=\left(a^3-8\right)-\left(6a^2-12a\right)=\left(a-2\right)\left(a^2+2a+4\right)-6a\left(a-2\right)\)

\(=\left(a-2\right)\left(a^2+2a+4-6a\right)=\left(a-2\right)\left(a^2-4a+4\right)=\left(a-2\right)\left(a-2\right)^2\)