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:
0.2692307692
Step-by-step explanation:
14/52 = 0.2692307692
X best represents
the width must be x so that the length can be 12+x meaning that the length is greater than length by 12
