Răspuns:
Explicație pas cu pas:
[ - (125-21)90 + (14-1)/90] * [12 - (115-11)/90 - (184-18)/90]
[-104/90+13/90] * [12 - 104/90 - 166/90]
-91/90 * [12-270/90]
-91/90 * (12-3) = -91/90 * 9 = -91/10
a. x = [(56-5)/9 - 15/4 + 3/4] * 3/2
x = [ 51/9 - 12/4] * 3/2
x = (51/9 - 3) * 3/2
x = (51-27)/ 9 *3/2
x = 24/9 * 3/2
x = 4
y = (1/12)⁻¹ + √116,64 : 27/10
y = 12 + 10.8 * 10/27
y = 12 + 108/10 * 10/27
y = 12 + 4
y = 16
MA = (4+16)/2 = 10
MG = √4*16 = 2*4 = 8
b. x = (18/5)⁻¹ + √75/90 * 3/90
x = 5/18 + √225
x = 5/18 + 15
x = 275/15 = 55/3
y = 7/2√3 * [-0.125+1]⁻¹
y = 7/ 2√3 * 0.875⁻¹
y = 7/2√3 * 1000/875
y = 7/2√3 * 8/7 = 4/√3
MA = (55/3 + 4/√3) / 2 = (55+4√3)/6
MG = 55/3 * 4√3/3 = √220√3/9 =
