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a5a-3a2 / a3a-4a-1.

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.

a5a-3a2 = a5-3+2 = a4.

- a3a-4a-1 = a3-4-1 = a-2.

a4 / a-2 = a6.

: a6


z (p - 3) / (p2 + 3p) : z 12 / (9 - p2) z 3 / (3p - p2) .

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:

z (p - 3) / (p2 + 3p) : z 12 / (9 - p2) z 3 / (3p - p2) = z (p - 3) / p (p + 3) - 12 / (3 - p) (3 + p) + 3 / p (3 - p) .

z. :

(p - 3) / [p(p + 3)] - 12 / [(3 - p)(3 + p)] + 3 / [p(3 - p)] =

[(p - 3)2 + 12p - 3(p + 3)] / [p(p + 3)(p - 3)] = [p2 - 6p + 9 + 12p - 3p - 9] / [p(p + 3)(p - 3)] =

[p2 + 3p] / [(p2 + 3p)(p - 3)] = 1/(p - 3)

z 1 / (p - 3)

: z 1 / (p - 3)


.


______________________________________

:

= = =

= = .


: .


7 - 212.

____________________________

:

7 - 212 = 7 - 43 = 4 - 43 + 3 = (2 - 3)2 = |2 - 3| = 2 - 3

: 2 - 3


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