Pls ans me 8th questions in a proper method...fast its urgent...pls answer dont give suggestions...
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Answer:
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Answer:
Step-by-step explanation:
1. a=-5/9 b=-3/5
lhs: a+b=-5/9-3/5=-25-27/45=--52/45
rhs: b+a=-3/5-5/9=-27-25/45=-52/45
LHS=RHS
2. a=7/5 b=-9/4 c=1/2
b*c=(-9/4)*(1/2)=-(9/8)
lhs:a*(b*c)=(7/5)*(-9/8)=-63/40
rhs: a*b=7/5*(-9/4)=-63/20
(a*b)*c=(-63/20)*(1/2)=-63/40
lhs=rhs
3. lhs: b+c
a=-2 b=9/5 c=-2/15
a*(b+c)=(-2)*(9/5-2/15)=(-2)(25/15)=-50/15=-10/3
rhs:
a*b=(-2)(9/5)=-18/5
b*c=(9/5)(-2/15)=-18/75=-6/25
a*b+b*c=(-18/5)+(-6/25)
=-6(15+1/25)
=-96/25
lhs!=rhs
4. b-c=-3/4+2/3=-9+8/12=-1/12
lhs: a*(b-c)=(-1/2)(-1/12)=1/24
rhs: a*b=(-1/2)*(-3/4)=3/8
b*c=(-3/4)*(-2/3)=1/2
a*b-b*c=3/8-1/2=-1/8
lhs!=rhs
5. x=-3/4
y=-9/8
x/y=(-3/4)/(-9/8)=2/3
lhs: (x/y)^-1=3/2
rhs: x^-1=1/x=1/(-3/4)=-4/3
y^-1=1/y=(1)/(-9/8)=-8/9
x^-1/y^-1=(-4/3)/(-8/9)=3/2
lhs!=rhs