Question

(2x+1)²-3(x-5)²=(x+3)(x-3)

Answer 1

( 2х + 1 )^2 - 3( х - 5 )^2 = ( х + 3 )( х - 3 )
4х^2 + 4х + 1 - 3х^2 + 30х - 25 = х^2 - 9
34х = 24 - 9
х = 15 : 34
х = 15/34