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1 An orange is being eaten by my friends.
2 The film is being watched.
3 The exercise is being done by us.
4 The paper is being cut by her right now.
5 The songs are being sung in the room.
Ex3 passive voice : The future simple tense
1 They won't punish him => HE WON'T BE PUNISHED
2 They will ask you a lot of question at the interview => A LOT OF QUESTION WILL BE ASKED BY YOU THE INTERVIEW
3 They will give her a new one => SHE WILL BE GIVEN A NWE ONE
4 Tom will visit his parents next month => HIS PARENTS WILL BE VISITED BY TOM NEXT MONTH
5 Some people will interview the new president on TV => INTERVIEW THE NEW WILL BE PRESIDENTED ON TV BY SOME PEOPLE
\(DK:x\ge4\)
\(\Leftrightarrow x=\sqrt{x-4}\left(1+\sqrt{1+x}\right)\)
\(\Leftrightarrow x=\sqrt{x-4}+\sqrt{x^2-3x-4}\)
\(\Leftrightarrow x^2=x^2-2x-8+2\sqrt{\left(x-4\right)\left(x^2-3x-4\right)}\)
\(\Leftrightarrow x+4=\sqrt{x^3-7x^2+8x+16}\)
\(\Leftrightarrow x^2+8x+16=x^3-7x^2+8x+16\)
\(\Leftrightarrow x^3-8x^2=0\)
\(\Leftrightarrow x^2\left(x-8\right)=0\)
\(\Leftrightarrow\orbr{\begin{cases}x=0\left(l\right)\\x=8\left(n\right)\end{cases}}\)
Vay PT co mot nghiem la \(x=8\)