Answer:
where is the graph????
Step-by-step explanation:
Answer:
f(x)=x^2+3
f(x+y)=(x+y)^2+3
this is done by replacing x with (x+y)
f(x+y)=x^2+2xy+y^2+3
therefore : f(x+y)= x^2+y^2+2xy+3
Answer:
B.
<h3>step by step explanation</h3>
I hope it's help
Answer:
70
Step-by-step explanation: