Question

EX 1 VA IMPLOR MUUULT ​

Answer 1

Răspuns:

a)(33x+77)÷2=22

33x+77=22×2=44

33x=44-77=-33

b)x×2+7=-2

x×2=-2-7=-9

x=-9÷2=-4.5

punctul c nu stiu

Answer 2

$c)\quad |1-\sqrt 2|\text{ si } |1+\sqrt 2 \\ \\ mg = \sqrt{|1-\sqrt 2|\cdot |1+\sqrt 2|} = \sqrt{|(1-\sqrt 2)(1+\sqrt 2)|} = \\ \\ = \sqrt{|1^2-\sqrt 2 ^2|} = \sqrt{|1-2|} = \sqrt{|-1|} = \sqrt 1 =1$