Question

(i) (9 - y) (7 + y)​

Answer 1

Answer:

y square (9-7) =0

y square 2=0

y square = -2

Answer 2

Answer:

$(9 - y)(7 + y) \\ \\ </p><p>9(7 + y)- y(7 + y) \\ \\ </p><p>63 + 9y - 7y - {y}^{2}\\ \\ </p><p>63 -2y - {y}^{2}$