2а+4-3а+6 10-а1) ...= ------------------ = ------------ а^2+2а-2а-4 а^2-4
2) 10-а 4-а^2 10-a a^2-4 1 ------------ * -------------- = ----------- * - ( --------- ) = - ---- а^2-4 10a-a^2 a^2-4 a(10-a) a
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2а+4-3а+6 10-а
1) ...= ------------------ = ------------
а^2+2а-2а-4 а^2-4
2) 10-а 4-а^2 10-a a^2-4 1
------------ * -------------- = ----------- * - ( --------- ) = - ----
а^2-4 10a-a^2 a^2-4 a(10-a) a