Question

Factorise polynomials: 14(3y-5z)³+7(3y-5z)²

Answer 1

14(3y - 5z)^3 + 7(3y - 5z)^2

= 7[2(3y - 5z)^3 + (3y - 5z)^2]

= 7(3y - 5z)^2[2(3y - 5z) + 1]

= 7(3y - 5z)^2[2(3y) - 2(5z) + 1]

= 7(3y - 5z)^2(6y - 10z + 1)