Work out . Give your answer in standard form.
Answer and explanation
Correct answer: D.
- Step 1: Multiply the numbers: .
- Step 2: Add the powers of : .
- Step 3: The answer is .
Answer
.
Why not the others: : This adds and instead of and . : This multiplies the powers () instead of adding them. : This slips when adding the powers, giving instead of .
Practise more Number.
Free questions with an explanation for every one, and full timed GCSE English and Maths Resits (Grade 4) mock tests.