Question

para x=8, calcular o valor de:

a) 2x=

b) 3x-30=

c)15-5x=

d) 3x^2+12=​

Answer 1

x = 8

a) 2x = 2 . 8 = 16

b) 3x - 30 = 3 . 8 - 30 = 24 - 30 = - 6

c) 15 - 5x = 15 - 5 . 8 = 15 - 40 = - 25

d) 3x² + 12 = 3 . 8² + 12 = 3 . 64 + 12 = 192 + 12 = 204