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Sagot :

SHANA93K
Bonjour

a) 2*x - 2*3 + 4*1 - 4*x
= 2x - 6 + 4 - 4x
= 2x-4x -6+4
= -2x -2

b) -3*1 -3*(-2x) -2*x + (-2)*5
= -3 +6x -2x -10
= +6x -2x -3 -10
= +4x -13
MAUDMARINE

Bonjour

Développe et réduis les expressions :

a) 2(x – 3) + 4(1 – x)

= 2x - 6 + 4 - 4x

= 2x - 4x - 6 + 4

= - 2x - 2

b)–3(1–2x )–2(x+5)

= - 3 + 6x - 2x - 10

= 6x - 2x - 10 - 3

= 4x - 13.

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