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svetlana6712
@svetlana6712
July 2022
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Решите с объяснением:
(x+2)^2=(x+5)^2
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Хуqожнuк
(a+b)² = a² + 2ab + b²
(x+2)² = (x+5)²
x² + 4x + 4 = x² + 10x + 25
x² + 4x - x² - 10x = 25 - 4
-6x = 21
x = 21 : (-6)
x = -21/6
x = -3.5
ОТВЕТ: -3,5
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Thanks 0
svetlana6712
(2x+3)^2=(-x-7)^2
MizoriesKun
(x+2)^2=(x+5)^2 (2x+3)^2=(-x-7)^2
x
²+4x+4=x²+10x+25 4x²+12x+9=x²+14x+49
-6x=21 3x²-2x-40=0
x=-21/6=- 3 1/2 D=4+480=484 √D=22
x=(2+22)/6= 4
x=(2-22)/6= -20/6 = -3 1/3
1 votes
Thanks 0
svetlana6712
(2x+3)^2=(-x-7)^2
MizoriesKun
обнови страничку
svetlana6712
спасибо
svetlana6712
4x²+12x+9=x²+14x+49 почему тут 12?
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Answers & Comments
(x+2)² = (x+5)²
x² + 4x + 4 = x² + 10x + 25
x² + 4x - x² - 10x = 25 - 4
-6x = 21
x = 21 : (-6)
x = -21/6
x = -3.5
ОТВЕТ: -3,5
x²+4x+4=x²+10x+25 4x²+12x+9=x²+14x+49
-6x=21 3x²-2x-40=0
x=-21/6=- 3 1/2 D=4+480=484 √D=22
x=(2+22)/6= 4
x=(2-22)/6= -20/6 = -3 1/3