Question

Resolva as expressões a)√81-√36+√100-3.√25-7
B) 12-5.√81+√25:(-5)+2.(-3)³
C) {[(40-7²)²:(-√9)+(16-5.4²)]²}:{-3.[(√25-8²)+50]-2

Answer 1

Explicação passo-a-passo:

a)

9-6+10-3×5-7=9-6+10-15-7=-9

b)

12-5×9+5÷(-5)+2×9=12-45-1+18=-16

c)

(((40-49)^(2)÷(-3)+(16-5×16))^(2))÷(-3×((5-64)+50)-2

=((81÷(-3)+4096)÷(-3×(-9)-2)

= 4123÷25

=164,92