Question

calcule as expressões:
(2+3)²-(2²+3²)=


{-2.[4-(2.5)+8]²-5}=

Answer 1

a)

= (2 + 3)² - (2² + 3²)
= 5² - (4 + 9)
= 25 - (13)
= 25 - 13
= 12
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b)
= { - 2. [4 - (2.5) + 8]² - 5}
= { - 2. [ 4 - 10 + 8]² - 5}
= { - 2 . [ 12 - 10]² - 5}
= { - 2. [2]² - 5}
= { - 2.4 - 5}
= { - 8 - 5}
= - 13