👤

2) Développer les expressions et
réduire quand c'est possible
A = 6( x + 8)
B = a( 7-a)
C = 7( x + 2y + 9) + 3( 5x – 3y - 1)

Sagot :

a(c+b) = ac +AB

a(c-b) =ac -ab

a(b+c+d)=ab +ac +ad

a(b-c-d)=ab-ac-ad

A=6(x +8)

A= 6x +6×8

A=6x +48

B=a(7 -a)

B= a×7 - a×a

B= 7a - (a)2

C= 7(x +2y +9) + 3(5x -3y -1)

C= (7x +7 ×2y +7×9) +(3×5x -3×3y -3×1)

C= 7x + 14y +63 + 15x -9y -3

C= 22x +5y +60

© 2024 IDNLearn. All rights reserved.