The third answer is correct.
Answer: 1/3.(√3/4)×40×40 ×5√(5
Step-by-step explanation:
Answer:

Step-by-step explanation:
(x+3)(x+3)
distribute the x to both three and x.
x * x + 3x * 3x
add like terms.
X^2 + 9x
7+7+7+7=28
7x4= 28
If you are learning multiplication you can use those