Question

Podem Me Ajudar Com Essas Questões ?

Answer 1

a)
${x}^{5} - {x}^{4} + 5 \\ {x}^{5 - 4 } + 5 \\ {1}^{1} + 5 \\ 6$
b)
${x}^{3} - 2x + 1 = 0 \\ ( { - 1}^{3} ) - 2 \times ( - 1) + 1 = 0 \\ - 1 - ( - 2) + 1 = 0 \\ - 1 + 2 + 1 = 0 \\ 2 = 0$
obs:errado/inconclusivo
C)
$\frac{4x - 1}{3} \\ \frac{4 \times ( - 2) - 1}{3} \\ \frac{ - 8 - 1}{3} \\ - 9 \div 3 = - 3$
D)
$\frac{4 {x}^{3} - 2x + 1}{3x + 2} \\ \frac{4 \times ( - 8) - 2 \times ( - 2) + 1}{3 \times ( - 2) + 2} \\ \frac{ - 32 + 4 + 1}{ - 4} \\ \frac{ - 27}{ - 4} \\ + 6.75$
E)
$5ab - 6 {a}^{2} + 9 {b}^{3} - 7 \\ 5 \times 0 \times ( - 1) + 6 \times {0}^{2} + 9 \times ( { - 1}^{2} ) - 7 \\ 0 + 0 + 9 - 7 \\ + 2$