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apomat1234
apomat1234
19.01.2023 08:52 •  Алгебра

Самостоятельная по алгебре 7 класс ​

👇
Ответ:

Объяснение:

1) x²+2xy+y²-49=(x+y)²-7²=(x+y-7)(x+y+7)

2) a²-9b²+6bc-c²=a²-(3b-c)²=(a-3b+c)(a+3b-c)

3) a³+8-a²-2a=(a+2)(a²-2a+4)-a(a+2)=(a+2)(a²-2a+4-a)=(a²-3a+4)(a+2)

4) b⁶-4b⁴+12b²-9=b⁶-(2b²-3)²=(b³-2b²+3)(b³+2b²-3)

1) 6x³-24x=0; x²-4=0; x(x-2)(x+2)=0; x₁=0; x-2=0; x₂=2; x+2=0; x₃=-2

ответ: -2; 0 и 2.

2) 25x³-10x²+x=0; x(25x²-10x+1)=0; x₁=0

25x²-10x+1=0; D=100-100=0; x₂=10/50=1/5=0,2

ответ: 0 и 0,2.

3) x³+3x²-4x=0; x(x²+3x-4)=0; x₁=0

x²+3x-4=0

x₁+x₂=-3; -4+1=-3

x₁x₂=-4; -4·1=-4

x₁=-4; x₂=1

ответ: -4 и 1.

4,6(25 оценок)
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Ответ:
Ирина29403
Ирина29403
19.01.2023

0 және не знаю как гOTBET:

the afternoon, learn work

in lunchtime, I eat pizza and drink juice

in night, I watch TV or play mobile games

in weekend, I go to picnicin

Write the correct preposition, then complete the

sentences for you.

Write the correct preposition, then complete the

sentences for you.

Write the correct preposition, then complete the

sentences for you.

OTBET:

the afternoon, learn work

in lunchtime, I eat pizza and drink juice

in night, I watch TV or play mobile games

in weekend, I go to picnicin

OTBET:

the afternoon, learn work

in lunchtime, I eat pizza and drink juice

in night, I watch TV or play mobile games

in weekend, I go to picnicin

OTBET:

the afternoon, learn work

in lunchtime, I eat pizza and drink juice

in night, I watch TV or play mobile games

in weekend, I go to picnicin

OTBET:

the afternoon, learn work

in lunchtime, I eat pizza and drink juice

in night, I watch TV or play mobile games

in weekend, I go to picnicin

OTBET:

the afternoon, learn work

in lunchtime, I eat pizza and drink juice

in night, I watch TV or play mobile games

in weekend, I go to picnicin

OTBET:

the afternoon, learn work

in lunchtime, I eat pizza and drink juice

in night, I watch TV or play mobile games

in weekend, I go to picnicin

OTBET:

the afternoon, learn work

in lunchtime, I eat pizza and drink juice

in night, I watch TV or play mobile games

in weekend, I go to picnicin

OTBET:

the afternoon, learn work

in lunchtime, I eat pizza and drink juice

in night, I watch TV or play mobile games

in weekend, I go to picnicin

OTBET:

the afternoon, learn work

in lunchtime, I eat pizza and drink juice

in night, I watch TV or play mobile games

in weekend, I go to picnicin

OTBET:

the afternoon, learn work

in lunchtime, I eat pizza and drink juice

in night, I watch TV or play mobile games

in weekend, I go to picnicin

OTBET:

the afternoon, learn work

in lunchtime, I eat pizza and drink juice

in night, I watch TV or play mobile games

in weekend, I go to picnicin

Write the correct preposition, then complete the

sentences for you.

Write the correct preposition, then complete the

sentences for you.

Write the correct preposition, then complete the

sentences for you.

Write the correct preposition, then complete the

sentences for you.

Айару казак тілі ден 7ші тапсымадан 1 жұмбақты 2ші жұмбақты айтшы казак тілі ден 7ші тапсымадан 1 жұмбақты 2ші жұмбақты айтшы казак тілі ден 7ші тапсымадан 1 жұмбақты 2ші жұмбақты айтшы апай Саламатсызба апай Саламатсызба апай Саламатсызба апай Саламатсызба апай

4,8(65 оценок)
Ответ:
Влад1488228
Влад1488228
19.01.2023

a) х^2 + xy - x - ax + a - a = x^2+ xy - x - ax = x( x + y ) - x( 1 + a )

b) x^2 - 3x -x + 3 +3x -5 = x^2 - x - 2

                                              d = 1 + 4*2 = 9

                                        x_1 = (1 - 9) / 2 = -2 / 2 = -1

                                        x_2 = (1 + 3) / 2 = 4 / 2 = 2 

4,5(56 оценок)
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