Apply the distributive property.

Reorder.

Move to the left of .

Rewrite using the commutative property of multiplication.

Move .

Multiply by .

Reorder and .

Identify the exponents on the variables in each term, and add them together to find the degree of each term.

The largest exponent is the degree of the polynomial.

The maximum number of possible roots is the degree of .

Find the Maximum Number of Real Roots r(x)=x(90-x)