20б Реши неравенство (5/13)^3x−1/x-1 ≥ 169/25.

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Объяснение:

Фото на мае науке а ш72ш2гушуш 6а не

It’s a kind of meat: s_u__ _ _e

2 It’s very popular in Italy: p_ _t _

3 It’s small and white and has a strong smell: g_ _l_ _

4 Carrots, beans and potatoes are all v_ _ _t_ _ _ _s

5 It’s yellow and some people put it on hot dogs: m_ _ _a_ _

6 You put these on food to make it more tasty: s_ _c _.

7 You look at this when you go to a restaurant: m_ _ _.

8 You can make toast with this: b _ _ a _.

9 You put sugar into your coffee with this: t _ _ sp _ _ _.

10 Apples, oranges and bananas are all: f _ _t .

11 Why do people put salt and pepper on food? To make it more t_ _ t_ _ _.

12 You eat this first in a restaurant: s _ _ _t_ _.

Объяснение:

Объяснение:

№1

А) (2х+1)²= 4х²+4х+1

Б) (3а-с)²= 9а²–6ас+с²

В) (а+6)(а-6)= а²–36

Г) (3х-4у) (3х+4у)= 9х²–16у²

№2

А) у²-¼= (у–½)(у+½)

Б) х²+10х+25= (х+5)²

№3

(2х-у)²-4х(х-у)= 4х²–4ху+у²–4х²+4ху= у²

при у= -⅔

(–⅔)²=

ответ:

№4

А) 3(2а-b) (2a+b)= 3(4a²–b²)= 12a²–3b²

Б (х⁴+у³)² = (x^8)+2x⁴y³+(y^6)

В) (а+3b)²-(a-3b)²=(a+3b+a–3b)(a+3b–(a–3b))= a²(a+3b–a+3b)= a²*6b= 6a²b

№5

А) (2а-5)²-(2а-3) (2а+3)=0

(4a²–20a+25)–(4a²–9)=0

4a²–20a+25–4a²+9=0

–20a+34=0

20a=34

a=

a= 1,7

Б) 9с²-25=0

(3c–5)(3c+5)=0

совокупность:

3с–5=0

3с+5=0

совокупность:

3с=5

3с=–5

совокупность:

с=

с=

совокупность:

с=

с=