Answered

Développe et réduis les expressions :

A= 3(-2x+5) + (-2x+5) (x-3)

B= (2a - 5) (3-4a) - 2 (5-a)

C= - (3-4z) (z-2)

D= -5r(2-3r) + (-r-2) (2r+5)

Merciii

Sagot :

bonsoir

A = -6x + 15 -2x² +6x +5x-15

A = -2x² + 5x

B = 6a -8a-15+20a-10+2a

= -2a-25+20a+2a

= 20a-25

C = -(3z-6-4z²+8z)

= -(11z-4z²-6)

= 4z²-11z+6

D = -10r +15r² -2r²-5r-4r-10

D = -19r + 13r² -10