Question

Hey, can someone please explain how to do these questions? I really am lost :x
If f (x)= 1-2x
Find:
a) f (5)
b) f (-5)
c) f (1/4)
Thankyou in advance

Answer 1

f(x)=1-2x
f (5)=1-2(5) = 1-10 =-9

Answer 2

can you find f(-5)?

Answer 3

ohh ok, i see...
f (-5) = 1-2(-5)
= 1--10
= 11
like that right?

Answer 4

@mustafa2014

Answer 5

right :)

Answer 6

:D thanks

Answer 7

Yw

Answer 8

There is one other similar one that i dont understand too
If f (x) = 3x^2-4

Answer 9

Write f (2x) in its simplest form

Answer 10

f (2x)= 3(2x)^2-4 =3(4x^2)-4=12x^2-4