5) a 8a+a^2-4a+4 a
--- - ( ------------)* --- =
a-2 (a-2)(a+2) a+2
a (a+2)^2 a
= --- - ---------- * ---- =
a a+2 a a a
= ---- - ---- * --- = ---- - ---- =
a-2 a-2 a+2 a-2 a-2
=0
28c+c^2-14c+49 c
6) 2+ (---------------) * ---- -
(c-7)(c+7) c+7
c c+7 c c
- ---- = 2+ ---- * ----- - ----- =
c-7 c-7 c+7 c-7
c c
= 2+ ---- - ----- = 2
c-7 c-7
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5) a 8a+a^2-4a+4 a
--- - ( ------------)* --- =
a-2 (a-2)(a+2) a+2
a (a+2)^2 a
= --- - ---------- * ---- =
a-2 (a-2)(a+2) a+2
a a+2 a a a
= ---- - ---- * --- = ---- - ---- =
a-2 a-2 a+2 a-2 a-2
=0
28c+c^2-14c+49 c
6) 2+ (---------------) * ---- -
(c-7)(c+7) c+7
c c+7 c c
- ---- = 2+ ---- * ----- - ----- =
c-7 c-7 c+7 c-7
c c
= 2+ ---- - ----- = 2
c-7 c-7