Question

How to factorise 2a^2-72b^2

Answer 1

Answer:

2(a - 6b)(a + 6b)

Step-by-step explanation:

First you factor out 2 from the expression:

2(a^2 - 36b^2)

Then using a^2 - b^2 = (a - b)(a + b), you factor the expression:

2(a - 6b)(a + 6b)

Answer 2

Answer:

Step-by-step explanation:

First you factor out 2 from the expression:

2(a^2 - 36b^2)

Then using a^2 - b^2 = (a - b)(a + b), you factor the expression:

2(a - 6b)(a + 6b)