a) 21x-3-7(3x-1)
b) 5x-1-(15x-9)÷3
c) 3x(4x-3)-4x(3x-4)
d) (8x-4)÷4-(12x-3)÷3
e) (4x+3)(5x-4)-10x(2x-1)+12
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a) ... =21x-3-21x+7=4 ; b) ... =5x-1- (5x-3)*3:3=5x-1-5x+3=2 ;
c) ... =12x-9 -12x+16=7 ; d) ... =(2x-1)*4:4-(4x-1)*3:3=2x-1-4x+1=-2x ;
e) ... =20x²+15x-16x-12 - 20x + 10 + 12 = 20x²-21x+10 ;
c) ... =12x-9 -12x+16=7 ; d) ... =(2x-1)*4:4-(4x-1)*3:3=2x-1-4x+1=-2x ;
e) ... =20x²+15x-16x-12 - 20x + 10 + 12 = 20x²-21x+10 ;
Andreeabadea351:
Multumesc!
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