51.7k views
1 vote
F(3)=x^(3)-19x+30

Show that is equation = 0

1 Answer

5 votes

Sub in 3 for all the x: =(3)³ - 19(3) +30

Expand the brackets: =27 - 57 + 30

Solve the equation: =0

Say you've solved it: QED

User Dhanika
by
4.9k points