Question 3
EasyOriginal questionSolve for : .
Show the answer and explanation
CorrectNot quiteAnswer C
Correct answer: C
Explanation
Expand the bracket: .
Move terms: , so .
Hence .
Worth noting
If the 3 multiplies only (giving ), you get 6. The 3 must multiply every term inside the bracket.
- Concept
- Expanding a bracket before solving
- Typical timeTypical
- 40 s
- Your timeYours
- —
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