Question

Sendo A=(x²-2), B=(2x²+9) e C=(6x²+5) Calcule:
A) A+B+C

B) A-B+C​

Answer 1

Resposta:

A)A+B+C

(x2-2)+(2x2+9)+(6x2+5)=

x2+2x2+6x2-2+9+5=

9x2+12

B)A-B+C

(x2-2)-(2x2+9)+(6x2+5)=

x2-2x2+6x2-2-9+5=

5x2--6