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Bonjour besoin d'aide Exercice 4 : simplifier une expression
Simplifier les écritures suivantes :
R = 7x- (2x + 3) S=3-(8x - 5)
T = 12x - 1 +(-2+7x)
U = 2x² - (-3x² - 5)
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Sagot :

Bonjour,

R = 7x- (2x + 3)  = 7x-2x -3 = 5x-3

S=3-(8x - 5) = 3-8x +5 = -5x +5

T = 12x - 1 +(-2+7x) = 12x -1 -2+7x = 19x -3

U = 2x² - (-3x² - 5) = 2x² +3x² +5 = 5x² +5

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