Question

factorize (2x + 3 )( 3 - r ) - (2x - 5 )( 3 - r ) por favor

(a( a + b ) - b ( a + b )

Answer 1

(2x+3)(3-r)-(2x-5)(3-r)
Factorizando (3-r)
=(3-r){(2x+3)-(2x-5)}
=(3-r){2x+3-2x+5}
=(3-r)(8)

Factorizando (a+b)
a(a+b)-b(a+b)
=(a+b)(a-b)