Exercice : Supprimer les parenthèses, puis réduire chaque expression.
A = 50- (x +20)
B = −(10 + x) + (x + 5)
C = (x² - 4x) - (5x² + 2x - 1)
D = -(3-x + x²) + (-2x + 3x² - 8)
E = x-4-(2 + x) + (x + 5)
F = -(x-8) + (x − 6)-(7-x)
G = (x² + 5x-4) - (-2x² + 9x - 7)
A = 50- (x +20)
B = −(10 + x) + (x + 5)
C = (x² - 4x) - (5x² + 2x - 1)
D = -(3-x + x²) + (-2x + 3x² - 8)
E = x-4-(2 + x) + (x + 5)
F = -(x-8) + (x − 6)-(7-x)
G = (x² + 5x-4) - (-2x² + 9x - 7)
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Verified answer
Explications étape par étape:
A = 50 -x - 20 = -x-30
B = -10-x+x+5 = -5
C = x² - 4x -5x² -2x +1 = -4x² -6x +1
D = -3 +x -x² -2x +3x² -8 = 2x² -x -11
E = x -4 -2 -x +x +5 = x -1
F = -x +8 +x -6 -7 +x = x -5
G = x² +5x -4 +2x² -9x +7 = 3x² -4x +3
Explications étape par étape:
A= -x+30
B= -5
C= -3x²-6X+1
D= 2x²-x-11
E= X-1
F= x-5
G= 3x²-4x+3