A binomial squared is written like

So, we have 
So, we want to complete the square 
We can add and subtract 9 to write

Answer:
23+12=
Step-by-step explanation:
you just need figure it out in your head and see what sounds right
Answer:
evaluate 9(x+3)
expand 9x+27
Step-by-step explanation:
i think i am sorry if i am wrong
Answer:
21/7= 3
Step-by-step explanation:
Answer:
16
Step-by-step explanation:
Lets assume x is Elgas' age
And y is Alvins age
we know that alvin is 11 years younger than Elga which means,
x=y+11
and the sum of their age is 43
x+y=43
solve it and you get 16