Question

sabendo que A =
${x}^{3} - 3x {}^{2} + 8x - 7$
,B =
${2x}^{2} + 10$
e C =
${4x}^{2} + x - 14$
,calcule

a) A + B =

b) A - C =

c) A + B + C =

d) B + C - A =​

Answer 1

Resposta:

a) $x^{3} - x^{2} + 8x + 3$

b) $x^{3} - 7x^{2} + 7x + 7$

c) $x^{3} + 3x^{2} + 9x - 11$

d) $-x^{3} + 9x^{2} - 7x + 3$