Answer:
X=0
Step-by-step explanation:
It is a law that

Number( a) shouldn't be zero.
Step-by-step explanation:
De qué forma how is your night give me a picture
Hello,
There is a mistake: it is 816 cm² !!! (an area)
length are multiplied by 2,
so area are mutiplied by 2²=4
Area B=816*4=3264 (cm²)