Dik:
P=2a-8b
Q=-a+2b
a.P-Q=
(2a-8b)-(-a+2b)=
2a+a-8b-2b=
3a-10b
b.Q-P=
(-a+2b)-(2a-8b)=
-a-2a+2b+8b=
-3a+10b
INGAT!!
( - ) - ( - ) = ( + )
( - ) + ( - ) = ( - )
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= 2a - 8b + a - 2b
= 3a - 10b
q - p = - a + 2b - ( 2a - 8b )
= -a + 2b - 2a + 8b
= - 3a + 10b
Dik:
P=2a-8b
Q=-a+2b
a.P-Q=
(2a-8b)-(-a+2b)=
2a+a-8b-2b=
3a-10b
b.Q-P=
(-a+2b)-(2a-8b)=
-a-2a+2b+8b=
-3a+10b
INGAT!!
( - ) - ( - ) = ( + )
( - ) + ( - ) = ( - )