Question

oblicz wartosc wyrazen a 3x' minus 2 minus 2x plus 5 plus 4x gdy x=12 b 3a minus b plus 5a plus 2b minus 6 gdy a=2 i b =2 c x plus 2y minus 3y minus 3z plus 5z minus x gdy x =5,y=8,y= 6 d 3 w nawiasie x minus 4z plus y plus 4x minus z plus 2y zamknac nawias gdy x= 1, y=2 z=12

Answer 1

3*12-2-2*12+5+4*12=63

3*2-2+5*2+2*2-6=2

5+2*8-3*8-3*6+5*6-5=4

3(1-4*12+2+4*1-12+2*2)=-147

Answer 2

a) 3x-2-2x+5+4x=5x+3
     5*12+3=63

b) 3a-b+5a+2b-6=8a+b-6
    8*2+2-6=12

c) x+2y-3y-3z+5z-x=-y+2z
    8+2*6=20

d) 3(x-4z+y+4y-2y)=3x-12z+3y+12y-6y=3x+12z+9y
    3*1+12*12+9*2=3+121+18=142