If y = x2 + 2x , find the value of y when x = 3 plz !

Just plug 3 in for x
Y=x2+2x. Y=(3)2+2(3) 3(2)=6 2(3)=6 rewrite y=6+6 6+6=12 rewrite y=12
Hope this helps have a nice nite

Plug three into the x places and solve. so x squared is 3 times 3 which equals nine. and 2 times 3 is six. add nine and six thats your answer. 15.

9/12 is the answer because 3/4 times 3 each is 9/12

The answer is 10. and if you go by pemdas you would 1. multiplication 2. division 3. addition 4. subtraction