A = a +bc A = 1/4 +(-3/2 * 1/3) A = 1/4 + (-3*1)/(2*3) A = 1/4 -3/6 On met au dénominateur commun 12 A = (3*1)/(3*4) +(2*-3)/(2*6) A = 3/12 -6/12 A = (3-6)/12 A = -3/12 A = -(1*3)/(4*3) A = -1/4
B = a + (b/c) B = 1/4 +(-3/2)/(1/3) or (-3/2) / (1/3) = -3/2 * 3/1 B = 1/4 +( -3/2 * 3/1) B = 1/4 + (-3*3)/(2*1) B = 1/4 -9/2 On met au dénominateur commun 4 B = 1/4 - (2*9)/2*2) B = 1/4 - 18/4 B = (1-18)/4 B = -17/4
C = a/(b+c) C = 1/4 /(-3/2+1/3) C = 1/4 / (-(3*3)/(2*3) + (2*1)/(2*3)) C = 1/4 / (-9/6 + 2/6) C = 1/4 / ((-9+2)/6) C = 1/4 / -7/6 C = 1/4 * 6/-7 C = (1*6) /(4*-7) C = 6/-28 C = - 6/28 C = - (2*3) / (2*14) C = -2/2 * 3/14 C = -3/14
