Question

bracket 2 x minus 3 Y + 1 bracket close bracket 4 x square + 9 y square + 1 + 6 X Y + 3 Y - 2 X bracket close​

Answer 1

(2x-3y+1)(4x²+9y²+1+6xy+3y-2x)

identity =(a+b+c)(a²+b²+c²+ab+bc+ca)=a³+b³+c³+3abc

so answer=2x²+3y²+1²+3*2x*3y*1