Question

para x = 5 calcule o valor de : A
$2x$
B
$3x + 1$
C
$9 - x$
D
$x - 15$
E${x}^{2}$
F
$2{x}^{2} - 1$

Answer 1

a) 2 . 5 = 10

B) 3 . 5 + 1 = 16

c) 9 - 5 = 4

d) 5 - 15 = -10

e) 5 . 5 = 25

f) 2 . 5 . 5 - 1 = 49