Question

b) (5-×)2
c) (y-3)3
d) (x-7)3

Me Ajudem?

Answer 1

B) (5-×)2 =  25 - 10x + x^2

c) (y-3)3 = y³ + 3.y².(-3) + 3.y.(-3)² + (-3)³ ==> y³ - 9y² + 27y - 27 

d) (x-7)3 = x³ + 3.x².(-7) + 3.x.(-7)² + (-7)³ ==> x³ - 21x² + 49x - 243