Question

Zapisz w jak najprostszej postaci:

a)3(a+b)+(a-2b)

b)-4(x-z)-(x+y)

c)5(4x-7)+(7-4x)

d)(4x-y)-2(x+y)

e)2(3x-2y+3z)-5(x-y-z)

f)4x(x-y-z)-2z(4x-y+z)

g)3x²(x-2/3y)+5x(x²-7xy)

f)-2√2(a+√2b)-4(a√2-2b)

Answer 1

a)3(a+b)+(a-2b)=3a+3b+a-2b=4a+b

b)-4(x-z)-(x+y)=-4x+4z-x-y=-5x-y+4z

c)5(4x-7)+(7-4x)=5(16x²-49)=80x²-245

d)(4x-y)-2(x+y)=4x-y-2x-2y=2x-3y

e)2(3x-2y+3z)-5(x-y-z)=6x-4y+6z-5x+5y+5z=x+y+11z

f)4x(x-y-z)-2z(4x-y+z)=4x²-4xy-4xz-8xz+2yz-2z²=4x²-4xy-12xz+2yz-2z²

g)3x²(x-2/3y)+5x(x²-7xy)=3x³-2x²y+5x³-35x²y=8x³-37x³y

f)-2√2(a+√2b)-4(a√2-2b)=-2√2a-2√4b-4√2a+8b=-6√2a+4b