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asiamuhammad6
07.11.2019 •
Mathematics
Complete the square.
can you show how , i'm lost
x^2 + 20x - 4y + 100 = 0
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Ответ:
(x+10)^2 = (x+10)(x+10)
(x+10)^2 = x(x+10) + 10(x+10)
(x+10)^2 = x^2+10x + 10x + 100
(x+10)^2 = x^2 + 20x + 100
So this means
x^2+20x-4y+100 = 0
turns into
(x+10)^2 - 4y = 0
after we factor
The second equation listed above implies that we have a parabola because we can solve for y to get
-4y = -(x+10)^2
y = (1/4)(x+10)^2
Ответ:
im not funny idk
Step-by-step explanation:
what kind of math question is that