Question

Phân tích đa thức thành nhân tử:

+)5x²y²+15x²+30xy²

+)(x-2)(x-3)+4-x²

+)x²-7x+12

+)x³-2x²y+xy²-9x

+)x²-25+y²+2xy

+)x²-x-12

+)5x²5xy-x-y 

+)12y(2x-5)+6xy(5-2x)

+)16x²+24x-8xy-6y+y²

+)(x+3)(x+6)(x+9)(x+12)+81

Answer 1

bạn tách ra từng ít câu 1 thôi ạ

Answer 2

a: \(=5x\left(xy^2+3x+6y^2\right)\)

b: \(=\left(x-2\right)\left(x+3\right)-\left(x-2\right)\left(x+2\right)=\left(x-2\right)\left(x+3-x-2\right)=\left(x-2\right)\)

c: \(=\left(x-3\right)\left(x-4\right)\)

d: \(=x\left(x^2-2xy+y^2-9\right)\)

=x(x-y-3)(x-y+3)

e: \(=\left(x+y\right)^2-25=\left(x+y+5\right)\left(x+y-5\right)\)

f: \(=\left(x-4\right)\left(x+3\right)\)