Originally Posted by

**vikramtiwari** I think by degree they mean the sum of the highest power...

that is for example, the polynomial 7*x*2*y*3 + 4*x* − 9 has three terms, where the polynomial can also be expressed as 7*x*2*y*3 + 4*x*1*y*0 − 9*x*0*y*0.) The first term has a degree of 5 (the sum of 2 and 3), the second term has a degree of 1, and the last term has a degree of 0. Therefore, the polynomial has a degree of 5 which is the highest degree of any term.

Since, (*y* − 3)(2*y* + 6)( − 4*y* − 21) = − 8*y*3 − 42*y*2 + 72*y* + 378, the degree of the polynomial is 3.

So, will that make any change to what you have explained it above...

Thanks!