Answered

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Réduire chacune des expressions suivantes :

a. 3x -3x² + 5x--7-8x? +4;

b. x + 2x-5x +x+9;

c. 4x+3a -5x² + x-80 -7x;

d. 4y2 +5+ x²-10-9y2 - x?.

Sagot :

LEAFE

Bonjour,

A = 3x - 3x² + 5x - (-7) - 8x + 4

A = - 3x² 3x + 5x  + 7 - 8x + 4

A = - 3x² 8x - 8x + 11

A = -3x² + 11

B = x + 2x - 5x + x + 9

B = 2x + 2x - 5x + 9

B = 4x - 5x + 9

B = -x + 9

C = 4x + 3a - 5x² + x - 80 - 7x

C = - 5x² + 5x + 3a - 7x - 80

C = - 5x² - 2x + 3a - 80

D = 4y² + 5 + x² - 10 - 9y² - x

D = 4y²- 9y² + x² - x + 5 - 10

D = - 5y² + x² - x - 5