Bonjour je n'y arrive pas calculer les expressions suivante
A= -2/21 * 14/21 - 8/5 B= 1/4 + 5/3 * -1/8 C= 4/-3 + -7/6 * -2/5 D= ( 8/15 - 7/5 ) * ( -1/6 + 2/9) merci d'avance
A= -2/21 * 14/21 - 8/5 B= 1/4 + 5/3 * -1/8 C= 4/-3 + -7/6 * -2/5 D= ( 8/15 - 7/5 ) * ( -1/6 + 2/9) merci d'avance
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A = - 2/21 * 14/21
= - 28 / 441
= - 4 /63
B = 1/4 + 5/3 * - 1/8
= 1/4 - 5/24
= 6/24 - 5/24
= 1/24
C = - 4/3 - 4/6 * - 2/5
= - 4/3 + 8/30
= - 40/30 + 8/30
= - 32/30
= - 16/15
D = ( 8/15 - 7 /5) * ( - 1/6 + 2/9)
= ( 8/15 - 21/15) * ( - 3/18 + 4/18)
= - 3/15 * 1/18
= - 3/ 270
= - 1/90