Question

Factorise: 9x² - a² + 24x - b² + 16 + 2ab

Answer 1

Answer:

(3x + 4)^2 - (a - b)^2

Step-by-step explanation:

9x^2 - a^2 + 24x - b^2 + 16 + 2ab

Here we will do re-grouping

(9x^2 + 24x + 16) - (a^2 + 2ab - b^2)

(3x + 4)^2 - a^2 - 2ab + b^2

(3x + 4)^2 - (a - b)^2

Hope it helps!!