Answer:
The answer is three please give brainliest:D
Step-by-step explanation:
I would substitute y = x^2
4y^2 -21y+20=0
8, 9 you basically just evaluate the equation in the parentheses
Answer:
Matt's
Step-by-step explanation:
he has to give away $14 (-14)
and also $7 (-7)
The others have positive numbers.
Cos9x - cos5x = -2sin2x.sin7x
sin17x - sin3x = 2sin7x.cos10x
so f(x) =

=