Question 3
IndicesIf 9(x − ½) = 3x2, find the value of x.
- A.½
- B.1
- C.2
- D.3
Show the answer and explanation
Answer: B (1)
Explanation
Write 9 as 32: 32x − 1 = 3x², so x² − 2x + 1 = 0, i.e. (x − 1)² = 0 and x = 1.
If 9(x − ½) = 3x2, find the value of x.
Answer: B (1)
Write 9 as 32: 32x − 1 = 3x², so x² − 2x + 1 = 0, i.e. (x − 1)² = 0 and x = 1.