Question

1)calcule o valor das expressoes numericas :

A) (5-3/2)-²=


B)3.2²+[1,2.(3,2+1,8)]-√0,81+(1/2)=


calcule o valor numerico das expressoes:

A)7x-x³para x=2


B)2x+10y-6z para x= 2 e z =0

Answer 1

1)
a) (5-3/2)²
(2.5-3/2)²
(10-3/2)²
(7/2)²
49/4

b) 3.(2)²+[1,2.(3,2+1,8)] -√0,81+(1/2)
3(4)+[1,2.(5)]-0,9 + 0,5
12+6-0,4
18-0,4
17,6

2)
a) 7x-x³
7.2-(2)³
14-8
6

b) 2x+10y-6z
2.2+10y-6.0
4+10y-0
4+10y