Answer and explanation

Correct answer: C.

  1. Step 1: Expand the top: .
  2. Step 2: Divide the numbers: .
  3. Step 3: Subtract the powers: .
Answer
.
Why not the others: adds the powers instead of subtracting, forgets to divide 16 by 8, and forgets to divide the powers of .

Practise more Number, Surds, Indices and Bounds.

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Simplify ((2x 3) 4)/(8x 5). | UK GCSE