Question

а) (3x-8)(3x+8)(9x^2+64)=
б) (2z-6)(2z+6)-4z(z-1,5)=

Answer 1

(3x-8)(3x+8)(9xˇ2+64)=(9xˇ2-64)(9xˇ2+64) =81xˇ4 -4096
(2z-6)(2z+6)-4z(z-1,5)=4zˇ2-36-4zˇ2+6z=-36+6z=6(z-6)