РЕШИТЕ СРОЧНО, ПОЖАЛУЙСТА НАДООО СРОЧНОО

1. 12а^3х–16а^2х^2 4а^2х(3а–4х) а) ------------------------ = ------------------- = 20ах^3–15а^2х^2 5ах^2(4х–3а) -4а^2х(4х–3а) 4а = --------------------- = – ---- 5ах^2(4х–3а) 5х х^2–6х+9 (х–3)^2 х–3 б) --------------- = ------------ = ------- 9х^2–27х 9х(х–3) 9х 2. 2 5 18+25 43 а) ---- + ----- = --------- = ------ 5х 9х 45х 45х 1 1 х+4–х+4 8 б) ----- – ----- = -------------- = ----------- х-4 х+4 (х-4)(х+4) х^2–16 5b 13a^2•5b 5b в) 13а^2 • --------- = -------------- = ----- 26a^3 26a^3 2a 15х^2у 18у 15х^2у•35а^2b г) ---------- : ---------- = --------------------- = 7а^3 35а^2b 7а^3•18y 5x^2•5b 25x^2b = ------------ = ----------- 6a 6a 3. 6–x^2 6+x x+x^2+6-x^2 a) (x+ ---------) : --------- = ------------------ : 1+x x^2–1 1+x 6+x (x+6)(x-1)(x+1) : ------------ = ------------------ = x-1 (x-1)(x+1) (1+x)(6+x) 1 4х 1 1 б) ---- + -------- • (----- – -------) = х-2 4-х^2 х-1 х(х-1) 1 4х х-1 = – ----- + -------------- • -------- = 2-х (2-х)(2+х) х(х-1) 1 4х 4 1 = – ----- + --------------- = ------------- - ----- 2-х (2-х)(2+х)х (2-х)(2+х) 2-х 4–2–х 2-х 1 = -------------- = ----------- = ------ (2-х)(2+х) (2-х)(2+х) 2+х