19 A = 3 + (4 + x) B = 8 + (- 5 + x) 20 A = 7x + (- 3x + 2) A= B = 7+ (- 3x – 20) ► 21 21 A = – 5x +(7 + 5x) - B = 4 + (- 11x - 4) 2 x)
Mathématiques
timotheepoisson92
Question
19 A = 3 + (4 + x) B = 8 + (- 5 + x) 20 A = 7x + (- 3x + 2) A= B = 7+ (- 3x – 20) ► 21 21 A = – 5x +(7 + 5x) - B = 4 + (- 11x - 4) 2 x)
1 Réponse
-
1. Réponse lxdfo
Réponse:
A = 3+(4+x)
=3+4+x
=7+x
B=8+(-5+x)20
=8+20(-5+x)
=4(2+5(-5+x))
=4(2-25+5x)
=4(-23+5x)
C=7x+(-3x-20)
=7x-3x-20
=4x-20
=4(x-5)
D=-5x+(7+5x)
=-5x+7+5x
=7
E=4+(-11x-4)2x
=4+2x × (-11x-4)
=2(2+x × (-11x-4))
=2(2-11x²-4x)
bonne chance !