not doing the thing he did
Lady Macbeth
The line "what's done, is done" is spoken by Lady Macbeth in the play Macbeth.
Her part is decisive. If you read or watch Act 1 Scene 7 you will know that Macbeth, left on his own, decided not to commit the murder. He says "We shall proceed no further in this business." Lady Macbeth then proceeds to change his mind, at least for long enough that the deed gets done. She appeals to his irrational emotions, when his decision not to commit the murder was based on reason and logic, as shown in Macbeth's speech, "If it were done when 'tis done, then 'twere well it were done quickly."
the quotation from Shakespears Macbeth is "if it were done when 'tis done, then 'twer well it 'twer done quickly" (Macbeth, act 1 scene 7)
I'm guessing that you are asking two questions: "How does Malcolm feel about Macbeth?" and "What has Macbeth done to become the king?" The answer to the second question is simple: Macbeth killed King Duncan in order to become king. The answer to the first question is almost as simple: Malcolm hates and fears Macbeth. I hope your command of English is sufficient to understand this answer.
Drugged them.
she talked him into killing the King by accusing Macbeth of being weak and cowardly
Her part is decisive. If you read or watch Act 1 Scene 7 you will know that Macbeth, left on his own, decided not to commit the murder. He says "We shall proceed no further in this business." Lady Macbeth then proceeds to change his mind, at least for long enough that the deed gets done. She appeals to his irrational emotions, when his decision not to commit the murder was based on reason and logic, as shown in Macbeth's speech, "If it were done when 'tis done, then 'twere well it were done quickly."
Macbeth could have chosen to dismiss the witches' prophecies as mere manipulations rather than viewing them as a path to power. By focusing on his loyalty to King Duncan and his moral integrity, he could have resisted Lady Macbeth's ambition and persuasion. Additionally, seeking counsel from trusted allies or reflecting on the consequences of unchecked ambition might have steered him away from his tragic fate. Ultimately, prioritizing his values over ambition could have led to a different outcome.
Lady Macbeth's statement "What is done is done" is ironic because she says it to try to reassure herself and her husband after Duncan's murder, when in reality, the consequences of their actions continue to haunt them throughout the play. The statement reflects Lady Macbeth's attempts to suppress her guilt and anxiety by dismissing the gravity of their crimes, which ultimately leads to their downfall.
Lady Macbeth is telling Macbeth to grow up and just kill the King. But Lady Macbeth tells Macbeth that she cant kill him since he looks like her father, this shows the reader that Lady Macbeth isn't as crazy as we think she is.
After the banquet where Banquo's ghost appears, he tells Lady Macbeth that he "will send" so he hasn't done it yet. The next time we see him, he is visiting the witches, and then Lennox brings word that Macduff is fled to England. Macbeth says "Time, thou anticipat'st my dread exploits." What this means is that Macduff got away before Macbeth could get to him. It would seem that Macbeth never does send for Macduff.