Question

Sendo f(x) = 3x3 - 5x2 + 4x + 3 e g(x) = x3 + x2 + x - 1. Faça o que se pede:

a) f(x) + g(x) =

b) f(x) . g(x) =​

Answer 1

Sendo f(x) = 3x3 - 5x2 + 4x + 3 e g(x) = x3 + x2 + x - 1. Faça o que se pede:

a) f(x) + g(x) = 3x³-5x²+4x+3+x³+x²+x-1

=4x³+6x²+5x+2

b) f(x) . g(x) = ( 3x³-5x²+4x+3)(x³+x²+x-1)

3x⁶+3x⁵+3x⁴-3x³-5x⁵-5x⁴-5x³+5x²+4x⁴+4x³+4x²-4x+3x³+3x²+3x-3 =

= 3x⁶-2x⁵-2x⁴-x³+12x²-x-3