bonsoir qui peux m'aide a faire le n° 90  merci

90)

a) (2V3 + 1)² = 4*3 + 2*2V3 + 1 = 12 + 4V3 + 1 = 13 + 4V3

b) (2V3+1)(2V3-1) = (2V3)² - 1² = 4*3 - 1 = 12-1 = 11

c) (3V2 - 1)² = 9*2 - 2*3V2 + 1 = 18 - 6V2 + 1 = 19 - 6V2

d) (1+3V2)(1-3V2) = 1² - (3V2)² = 1 - 9 * 2 = -17

En espérant t'avoir aidé.

Bonsoir

a) = 12 + 4√3+1 = 13 + 4√3
b) = 12 -1 = 11
c) = 18 - 6√2 +1 = 19 -6√2
d) = 18 -1 = 17