Question

phân tích đa thức thành nhân tử 25X^2-Y+6YZ-9Z^2: làm hộ mik nha đg cần gấp

 

Answer 1

Ta có:\(25x^2-y^2+6yz-9z^2=25x^2-\left(y-3z\right)^2=\left(5x+y-3z\right)\left(5x-y+3z\right)\)

Answer 2

\(25x^2-y+6yz-9z^2\)

\(=\left(5x\right)^2-\left(y^2-6yz+9z^2\right)\)

\(=\left(5x\right)^2-\left(y-3z\right)^2\)

\(=\left(5x-y+3z\right)\left(5x+y-3z\right)\)

Vậy \(25x^2-y^2+6yz-9z^2=\left(5x-y+3z\right)\left(5x+y-3z\right)\)