Умножение многочлена на многочлен
=a-4 2a+4 1= =a–8a+1 =a (2a-1)-4 (2a-1)= =a 2a-a 1-4 2a+4 1= =2a 2 -a-8a+4 а-4 (2a-1) (a-4)(2a-1) =1-7a =2a 2 -9a+4
(a-4)(2a-1)= =a 2a-a 1-4 2a+4 1= =2a 2 -9a+4
(4+5x)(x+2)=4 x+4 2+5x x+5x 2= =4x+8+5x 2 +10x= (7a-b)(2a-b)= =7a 2a+7a (-b)+(-b) 2a+(-b) (-b)= =14a 2 -7ab-2ab+b 2 = (4+5x)(x+2) 14a 2 -5ab+b 2 5x 2 +14x+8
(x 2 +2x+3)(x+1)= x3x3 =x 3 +3x 2 +5x+3 +x 2 +2x 2 +2x +3x +3= (x 3 -2x 2 +5)(x 2 -3x)= x5x5 -2x 4 -3x 4 +5x 3 -15x=+5x 2 =x 5 -5x 4 +5x 3 +5x 2 -15x