Question

calcule o valor numérico das expressões


Me Ajudeeeee Urgenteeeeee​

Answer 1

a)

a = -3/2

b = 2/3

5a+2b

$5 \times - \frac{3}{2} + 2 \frac{2}{3} \\ - \frac{15}{2} + \frac{4}{3} \\ \frac{ - 45 + 8}{6} \\ \frac{ - 37}{6}$

b)

x = -2/3

x^2+3x

${x}^{2} + 3x \\ - (\frac{2}{3})^{2} + 3 - \frac{ 2}{3} \\ -\frac{4}{9} + - \frac{6}{3} \\ -\frac{4}{9} + - 2 \\ \frac{-4 - 18}{9} \\ \frac{ 22}{9}$