(Х+2)(а+4)(а+16)(а-2)=??? СРОЧНО

Question

(Х+2)(а+4)(а+16)(а-2)=??? СРОЧНО

Answer 1

(x+2)(a+4)(a+16)(a-2)= (ax+4x+2a+8)×(a+16)×(a-2)= (a²x+16ax+4ax+64x+2a²+32a+8a+128)×(a-2)=(a²x+20ax+64x+2a²+40a+128)×(a-2)=a³x-2a²x+20a²x-40ax+64ax-128x+2a³-4a²+40a²-80a+128a-256=a³x+18a²x+24ax-128x+2a³+36a²+48a-256.