Thoes are two separate questions number 10 and 11. Please help

Select the correct answer from the drop-down menu. subtracting 3xy^2 from 8xy^2 gives the same result as the expression. [tex]3xy ^{2} - 8xy ^{2} [/tex][tex] { - 7xy}^{2} - {2xy}^{2} [/tex][tex] {7xy}^{2} - {2xy}^{2} [/tex]

If x = -2, then x 2-7x+10 equals a. 0 b.20 c.28

Can some one me with these questions