Question

Sabendo que A= x²-3x³+8x- 7, B =2x²+10 e C= 4x³+x-14. Calcule.
a) A + B
b) A-C
c) A+B+C d) B+C-A

Me ajudem....

Answer 1

a)A+B=3x²-3x³+8x+3
b)A-C=x²-3x³+8x-7 - (4x³+x-14)=x²-7x³+7x+7
c)A+B+C=3x²+x³+9x-11
d)B+C-A=4x³+2x²+x-4-(x²-3x³+8x-7)=4x³+x²-7x+3