Question

Factorise: 36y² – 49

Answer 1

Answer:

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Answer 2

Answer:

Rewrite 36y236y2 as (6y)2(6y)2.

(6y)2−49(6y)2-49

Rewrite 4949 as 7272.

(6y)2−72(6y)2-72

Since both terms are perfect squares, factor using the difference of squares formula, a2−b2=(a+b)(a−b)a2-b2=(a+b)(a-b) where a=6ya=6y and b=7b=7.

(6y+7)(6y−7)(6y+7)(6y-7)