48÷2(9+3)=?

Wrong

The Distributive Property in ALgebra:

The Distributive Property is handy to help you get rid of parentheses.

a(b + c) = ab + ac

To multiply in algebra, you’ll use the distributive law:
3x(x+4)
= 3x(x) + 3x(4)
=3x2+12x

You can use the distributive Property to multiply a polynomial by a monomial. You will expand the product of the monomial and polynomial. You can use the distributive property to divide a polynomial by a monomial. Each term is divided by the monomial. You can also use the distributive property to find the product of binomials - as shown:

(x + y)(x + 2y)
=(x + y)x + (x + y)(2y)
=x2+xy +2xy 2y2
=x2 + 3xy +2y2

Let’s try one more:
2y(y-3)-3y(y+2)
=2y2-6y-3y2-6y
=-y2-12y