Question

Suppose that the functions r and s are defined for all real numbers x as follows.
R(x)=2x-4
S(x)=x-1
Write the expressions for
(r*s)(x)=
(r-s)(x)=
(r+s)(2)=

Answer 1

(r*s)(x) = R(x) * S(x)
(r-s)(x) = R(x) - S(x)
(r+s)(x) = R(x) + S(x)

Can you continue ?

Answer 2

2x-4*x-1
2x-4-x-1
2x-4+x-1

Answer 3

Awesome , now do your calculations , use parentheses.
(2x-4) (x-1) = 2x^2 -2x -4x + 4 = 2x^2 -6x + 4

(2x-4) - (x-1) = 2x-4 -x +1 = x -3

(2x-4) + (x-1) = 3x - 5

Answer 4

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