Answer:x4+9x2+25
Step-by-step explanation:
The 2 is an exponent.
(x2)2=x4. (X square)square= x to the 4th power because we add the exponents
(3x)2=9x. (3x square = 3x*3x=9x) since there is also an x make it x square
(5)2=25. (5 square = 5*5=25)
