Answer:
D. f (x ) = StartRoot x + 4 EndRoot
Step-by-step explanation:
desmos
B.f(x)=-1/3x^4+7x^2+15
Step-by-step explanation:
You can use a graph tool to graph the function a visualize the behavior.
Using a graph tool, the function,.f(x)=-1/3x^4+7x^2+15 could possibly have created the graph. See attached graph for the function.
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Graphs of polynomial function: brainly.com/question/12373761
Keywords: functions, created, graph
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By determining the area of the square, we get 
Step-by-step explanation:
Step 1:
The area of a square is given by squaring its side length.
The given squares side length is
cm.
The area of a square
Here a is the side length.
The area of the square is given as 7 cm².
Step 2:
Substituting the value of a in the equation, we get

Taking the x values on one side and the constants on the other side, we get

So 
So it has been proved.