ngày mai mk nộp rồi ai giúp vs
phân tích ĐT thành nhân tử
1) 4x3 - 14x2
2) 5y10 + 15y6
3) 9x2y2 + 15x2y - 21xy2
4) 3x2 ( x + 1) - 2(x + 1)
5) ( a + b + c )2 - (ab + bc + ca )( a + b + c) + ( a + b + c )
6) 4x2( x - 2y ) - 20x( 2y - x )
7) 3x2y( a - b + c ) + 2xy (b - a - c )
1: \(=2x^2\left(7x-2\right)\)
2: \(=5y^6\left(y^4+3\right)\)
3: \(=3xy\left(3xy-5x-7y\right)\)
4: \(=\left(x+1\right)\left(3x^2-2\right)\)
5: \(=\left(a+b+c\right)\left(a+b+c-ab-bc-ca-1\right)\)
6: \(=4x^2\left(x-2y\right)+20x\left(x-2y\right)\)
\(=4x\left(x-2y\right)\left(x+5\right)\)
7: \(=3x^2y\left(a-b+c\right)-2xy\left(a-b+c\right)\)
\(=xy\left(a-b+c\right)\left(3x-2\right)\)