Question 972281
Squaring (a+b)
It is the square of the first, TWICE their product, and square the second.

a^2+ 2ab +b^2

Here it is
[(1/4)x +3]^2    I edited this to be ((1/4) x and not 1/4x, which would be different.

(1/16)x^2 + 2*3*(1/4)x +9=

(1/16)x^2 + (3/2)x  + 9 ==========  2*3*(1/4)=(6/4)=(3/2)