bonjour je n'arrive vraiment pas a comprendre cette exercice pouvez vous m'aidez svp c pour demain !!
X denotes a number greater than 3.
Here is a rectangular parallélépipèd whose dimensions are given in cm.
Les dimensions sont: x-3, x, x+5

A. express as a function of X the total area A, in cm2, of its six faces

B. verify that this area A is equal to twice the area of a rectangle of dimensions x+4 and 3x-5