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Sagot :

VINS

bonjour

b =  4 + 4 r ³ - 2 r² + 16   = 4 r³ - 2 r² + 20

c = 28 x² +  9 x + 5 x + 20 + 3 x² = 31 x² + 14 x + 20

MARGESIMPSON1

Bonjour,

Simplifier :

B = 4+r×4r×r-2r×r+4×4

B = 4×4r³-2r×r+4×4

B = 4×4r³-2r²+4×4

B = 4×4r³-2r²+16

B = 20+4r³-2r²

↳ Loi commutative

B = 4r³-2r²+20

C = 14x×2x+9x+5x+2,5×8+x×3x

C = 28x²+9x+5x+2,5×8+x×3x

C = 28x²+9x+5x+20+x×3x

C = 28x²+9x+5x+20+3x²

C = 31x²+9x+5x+20

C = 31x²+14x+20

Bonne journée.

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