Question

Com as letras A,B e C vamos indicar estes polinomios
A=x-6 B=2x-1 C=4x+7

A) a-bc
B) c-ab
C) abc
D) a-c
E) a+b+c

AJUDEM PFV !!!!
QUEM PODER ME AJUDAR TEM MAIS 2 QUESTÕES

Answer 1

A=x-6
B=2x-1
C=4x+7


$A)A-BC\to (x-6)-(2x-1)*(4x+7)\to \\\\ x-6-8 x^{2} +14x-4x-7\to \\\\ -8 x^{2} -9x-13$



$B) C-AB\to (4x+7)-(x-6)*(2x-1)\to \\\\ 4x+7-2 x^{2} -x-12x+6\to \\\\ -2 x^{2} -9x+13$



$C) ABC\to (x-6)*(2x-1)*(4x+7)\to \\\\(2 x^{2} -x-12x+6)*(4x+7)\to \\\\\ (2 x^{2} -13x+6)*(4x+7)\to \\\\ 8x^3+14 x^{2} -52x^2-91x+24x+42\to \\\\ 8x^2-38x^2-67x+42$



$D=A-C\to (x-6)-(4x+7)\to \\\\ x-6-4x-7\to \\\\ -3x-13$



$E)A+B+C\to x+6+2x-1+4x+7\to \\\\ 7x+12$