URGENT SVP DEVOIR 3E RACINE CARRES

bonjour

a = √75 + 4 √12
a = √ 3 x 5² + 4 √3 x 2²
a = 5√3 + 8√3 = 13√3

b =  3√28 - 9 √7 
b = 3 √7 x 2² - 9 √7
b = 6√7 - 9 √7 = - 3√7

c= √2 + √50 + √18
c = √2 + √2 x 5² + √2 x 3²
c = √2 + 5√2 + 3√2 = 9√2

d = √2 ( √2 + 5 √3)
d = 2 + 5 √6 

a =V75+4V12 = V25x3 +4V4x3 =V5²x3 +4V2²x3 =5V3+8V3 =13V3

b = 3V28-9V7 =3V4x7 -9V7 =3V2²x7 -9V7 =6V7-9V7 = -3V7

c = V2+V50+V18= V2+V25x2+V9x2 = V2+V5²x2 +V3²x2 =V2+5V2+3V2 =9V2

d =V2(V2+5V3) = (V2)²+5(V2xV3) =2 +5V6