Sagot :
a)
5x * 7 = 35x
b)
5x * 3x = 15x²
Pour x= 6, on a:
aire(a) = 35 * 6 = 210
aire (b) = 15 * 6² = 1 5 * 36 = 540
1a. aireABCD = 7*5x
1b. aireABCD = 3x*5x
2a. AireABCD = 7(5*6) = 210
2b. AireABCD = (3*6)(5*6) = 540
1b. aireABCD = 3x*5x
2a. AireABCD = 7(5*6) = 210
2b. AireABCD = (3*6)(5*6) = 540