Question

calculati;
a) 2x-5y+8x+5y=
b) 7a+8c-b+14c-6a-21c=
c) 5m-6+3n+9m-4-5n-7m+2n-2m=
e) (6x+18y-14z)-(12x+15y+27z)-(5x-10y-40z)=
f) (6a²-15a+15)-(12a²-28a-36)+(8a²-16a-24)=
g) (√27x²-√8x-4y)-(5√27x²+5√18x-35y)+(4√3x²+7√8x-6y)=

Answer 1

a)10x
b)a-b+c
c)5m-10
d)nu exista:)
e)6x+18y-14z-12x-15y-27z-5x+10y+40z=13y-11x-z
f)6a²-15a+15-12a²+28a+36+8a²-16a-24=2a²-3a+27
g)3√3x²-2√2x-4y-15√3x²-15√2x+35y+4√3x²+14√2x-6y=25y-8√3x²-3√2x

Answer 2

a)2x-5y+8x+5y
=10x
b)7a+8c-b+14c-6a-21c=
a-b-c
c)5m-6+3n+9m-4-5n-7m+2n-2m=
5m-10
e)(6x+18y-14z)-(12x+15y+27z)-(5x-10y-40z)
6x+18y-14z-12x-15y-27z-5x+10y+40z
=-11x+13y-z
f)(6a²-15a+15)-(12a²-28a-36)+(8a²-16a-24)
=6a²-15a+15-12a²+28a+36+8a²-16a-24
=2a²-3a+27
g)(√27x²-√8x-4y)-(5√27x²+5√18x-35y)+(4√3x²+7√8x-6y)
√27x²-√8x-4y-5√27x²-5√18x+35y+4√3x²+7√8x-6y
=-4√27x²-√8x-5√18+4√3x²+7√8x+25y
=-4×3√3x²-2√2-5×3√2+4√3x²+7×3√2+25y
=-12√3x²-2√2-15√2+4√3x²+21√2+25y
=-8√3x²+4√2+25y