Question

Please solve 8(5x+9y)²+12(5x+9y). Which property is used in this.Please explain in brief.

Answer 1

Let 5x+9y=a
Therefore
(8a)sq +12a
4a{(2a)+(3a)}
=4a(2a+3al
Putting the value
4(5x+9y)(2(5x+9y))(3(5x+9y))
20x+36y(10x+18y)(15x+27y)