Answer: Choice D) 7x+2; all real numbers
-----------------------------------------------------
Work Shown:
f(x) + g(x) = [ f(x) ] + [ g(x) ]
f(x) + g(x) = [ 4x-5 ] + [ 3x+7 ]
f(x) + g(x) = 4x-5 + 3x+7
f(x) + g(x) = (4x+3x) + (-5+7)
f(x) + g(x) = 7x+2
The domain of y = 7x+2 is the set of all real numbers. There are no restrictions to worry about such as dividing by zero or taking the square root of a negative number. We can plug in any real number we want for x to get some output for y. This is one of the many properties of linear equations.
Answer:
<u>4</u>
Step-by-step explanation:
Given :
<u>f(x) = x² - 6x + 8</u>
<u />
=============================================================
Solving :
<u>Splitting the middle term</u> :
⇒ f(x) = x² - 6x + 8
⇒ f(x) = x² - 2x - 4x + 8
⇒ f(x) = x (x - 2) - 4 (x - 2)
⇒ f(x) = (x - 4)(x - 2)
============================================================
Solutions :
⇒ x - 4 = 0 ⇒ x = <u>4</u>
⇒ x - 2 = 0 ⇒ x = 2
You do whatever number to the 2nd or 3rd power
What does this mean I don't understand sorry I can't help!