Question

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 )

Answer 1

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: \(=3x^2y\left(a-b+c\right)-2xy\left(a-b+c\right)\)

\(=xy\left(a-b+c\right)\left(3x-2\right)\)