Question

$1) : (2a + 3b)(3a + 4b - 6c) \\ 2 ) \: (5x + 10y)(5x - 10y)$
solve it problem​

Answer 1

1. = 6^2 + 12b^2+17ab-30ac

2. = a^2-b^2

= 25x^2 - 100y^2

it is your answer