Bonjour j’ai besoin svpp
Développe et réduis chaque expression:
A = -2(x - 5) - 3(7 - 4x)
B = 8 + 2y - 5(2y - 6) + 4
C = 3x + 5x (4 - 2x) - 2(x2 - 3x + 5)
D = 8 + 2x - 2x (3x - 4) + 5x (3 - x)
E = 7y + 4(3y - 6) + 3 + 2(3y - 7)
Développe et réduis chaque expression:
A = -2(x - 5) - 3(7 - 4x)
B = 8 + 2y - 5(2y - 6) + 4
C = 3x + 5x (4 - 2x) - 2(x2 - 3x + 5)
D = 8 + 2x - 2x (3x - 4) + 5x (3 - x)
E = 7y + 4(3y - 6) + 3 + 2(3y - 7)
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bonsoir,
A = -2(x - 5) - 3(7 - 4x)
= -2x +10 -21 +12x
= 10x -11
B = 8 + 2y - 5(2y - 6) + 4
= 8+2y -10y +30 +4
= -8y +42
C = 3x + 5x (4 - 2x) - 2(x² - 3x + 5)
= 3x +20x -10x² -2x² +6x -10
= -12x² +29x -10
D = 8 + 2x - 2x (3x - 4) + 5x (3 - x)
= 8+2x -6x² +8x +15x -5x²
= -11x²+25x +8
E = 7y + 4(3y - 6) + 3 + 2(3y - 7)
= 7y +12y -24 +3 +6y -14
= 25y -35