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venera2501
@venera2501
July 2022
1
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помогите сделать b1, b2 и с1 пожалуйста! что сможете решить, решите пожалуйста
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m11m
В1.
к=
(x-3)(x-7)
-
(x-7)(x-1)
+
(x-1)(x-3
)=
2(x²-3x-7x+21)-3(x²-7x-x+7)+(x²-x-3x+3)
=
12 8 24 24
=
2(x²-10x+21)-3(x²-8x+7)+x²-4x+3
=
2x²-20x+42-3x²+24x-21+x²-4x+3
=
24 24
=
24
= 1
24
k²-1=1²-1=0
В2.
а
= 10
b
(a-b)²
=
a²-2ab+b²
=
a²
-
2ab
+
b²
=
a
- 2 +
b
= 10 -2 +
1
= 8+0.1=8.1
ab ab ab ab ab b a 10
C1.
3 +
a
=
3x
x+5 x+5
3(x+5)+a
=
3x
x+5 x+5
3x+15+a = 3x
15+a=0
a=-15
Ответ: а=-15.
2 votes
Thanks 1
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Answers & Comments
к= (x-3)(x-7) - (x-7)(x-1) + (x-1)(x-3)= 2(x²-3x-7x+21)-3(x²-7x-x+7)+(x²-x-3x+3) =
12 8 24 24
=2(x²-10x+21)-3(x²-8x+7)+x²-4x+3 = 2x²-20x+42-3x²+24x-21+x²-4x+3 =
24 24
= 24 = 1
24
k²-1=1²-1=0
В2.
а = 10
b
(a-b)² = a²-2ab+b² = a² - 2ab + b² = a - 2 + b = 10 -2 + 1 = 8+0.1=8.1
ab ab ab ab ab b a 10
C1.
3 + a = 3x
x+5 x+5
3(x+5)+a = 3x
x+5 x+5
3x+15+a = 3x
15+a=0
a=-15
Ответ: а=-15.