Предмет: Алгебра, автор: Аноним

ФНайти моленск : о х 1) при r=-8 2 Найти допустимые зачена букв входящих в дробь: 4 a 2) при а= 0 - 8 2 5 1) 1 х 18 4) с – 3 -3 5) 3) при с = 5 т — п с – 5 2) т +5 р? – 4 n 4) 3+2b b при b = -3 3) п? +9 = = 3) Разложките на множители: 117–14a= 2)4a®ь+18Ь?а: 3)36-c? = 4)1 674 – 81x1 = =​

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Ответы

Автор ответа: Аноним
0

1. подставим значения, получим ответы

1)-8/4=-2

2)0/5=0

3)18/(5-5)=18/0 не имеет смысла

4) (3+2*(-3))/(-3)=-3/(-3)=1

2. на нуль делить нельзя, поэтому знаменатель не равен нулю.

1) х

2)m+5≠0 m≠-5

3) n²+9>0 для любого значенияn;  n∈R,  т.е.  допустимые значения - любое действительное число

4) с-3≠0; с≠3;

5)р²-4≠0; р²≠4; р≠±2

3.

1)  7-14а-7*(1-2а)

2)  4а²b+18ab²=2ab*(2a+9b)

3)3 6-c²=6²-c²=(6-c)*(6+c)

4)  16z⁴-81x⁴=(4z²-9x²)*(4z²+9x²)=(2z-3x)*(2z+3x)(4z²+9x²)

5)  4+4у+у²=(2+у)²

6) у³-2³=(у-2)*(у²+2у+у²)

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