Question

Factorise 2d^2-98 completely​

Answer 1

2(d^2-49)


2(d-7) x (d+7)

Answer 2

Hello,

2 (d + 7) (d - 7)

Explanation:

2 d² - 98 = 2 (d² - 49) = 2 (d² - 7²)

a² - b² = (a + b) (a - b)

2 (d² - 7²) = 2 (d + 7) (d - 7)