Identities (Edexcel GCSE Maths): Quizzes

True for all values

≡

Manipulate each side separately

The more complex side

$2n$

$2n + 1$ or $2n - 1$

$n, n + 1, n + 2$

Never

$2n, 2n + 2, 2n + 4$

Because 3 is a factor

Every line of working

$2n + 1, 2n + 3, 2n + 5$