Tolong bgt..
y = x^2 - 2x
y = -x^2 + 6x + 9
Cara eliminasi dan subtitusi hasilnya harus sesuai dgn ( -0.915 , 2.67 )
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comment ga perlu maaf saya BLOCK
y = x^2 - 2x
y = -x^2 + 6x + 9
Cara eliminasi dan subtitusi hasilnya harus sesuai dgn ( -0.915 , 2.67 )
.
.
comment ga perlu maaf saya BLOCK
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y = x^2 - 2x
y = -x^2 + 6x + 9
...kurangkan
0= 2x^2 -8x - 9
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2x^2 - 8x -9 = 0
x^2 - 4x - 9/2 = 0
x^2 - 4x = 9/2
(x-2)^2 = 9/2 + 4 = 17/2
x - 2 = √(17/2) = ¹/₂ √34
x₁ = 2 + ¹/₂ √34 = 4,915 --> y₁= 14,32
x₂ = 2 - ¹/₂ √34 = - 0,915--> y₂ = 2,67