Question

result obtain on subtracting product of 2x and (x-3y) from product of (5x+3y)and (2y+1)​

Answer 1

5x+3y×2y+1

10xy+5x+6y^2+3y this is 1

2x×x-3y

2x^2-6xy this is 2

now 2-1

(2x^2-6xy)-(10xy+5x+6y^2+3y)

I hope this helps you.