Simplify .
Answer and explanation
Correct answer: B.
- Step 1: Square each part inside the bracket: , , .
- Step 2: The result is .
Answer
.
Why not the others: : The coefficient has not been squared. : This adds the powers instead of multiplying them. : The has not been squared.
Practise more Algebra.
Free questions with an explanation for every one, and full timed GCSE English and Maths Resits (Grade 4) mock tests.