Question

10ax-5ay+2x-y

12 phút trước

2x^2-6xy+5x-15y

12 phút trước

x^2-2x+1-4a^2

11 phút trước

25a^2-4x^2+4x+1

11 phút trước

36x^2-a^2+10a-25

Answer 1

\(2x^2-6xy+5x-15y=2x\left(x-3y\right)+5\left(x-3y\right)=\left(2x+5\right)\left(x-3y\right)\\ x^2-2x+1-4a^2=\left(x-1\right)^2-4a^2=\left(x-2a-1\right)\left(x+2a-1\right)\\ Sửa:25a^2-4x^2+4x-1=25a^2-\left(2x-1\right)^2=\left(5a-2x+1\right)\left(5a+2x-1\right)\\ 36x^2-a^2+10a-25=36x^2-\left(a-5\right)^2=\left(6x-a+5\right)\left(6x+a-5\right)\)

Answer 2

\(5a\left(2x-y\right)+\left(2x-y\right)=\left(5a+1\right)\left(2x-y\right)\)