Question no. 4) 2 (2x - 5y) (3x + 4y) - 6 (2x - 5y) (x - y)
Dear Student,
2(2x - 5y)(3x + 4y) - 6(2x - 5y)(x - y)
= (2x - 5y)[2(3x + 4y) - 6(x - y)]
= (2x - 5y)(6x + 8y - 6x + 6y)
= 14y(2x - 5y)
2(2x - 5y)(3x + 4y) - 6(2x - 5y)(x - y)
= (2x - 5y)[2(3x + 4y) - 6(x - y)]
= (2x - 5y)(6x + 8y - 6x + 6y)
= 14y(2x - 5y)