Integral Calculus: Plane Areas in Rectangular Coordinates

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Find the area bounded by the given curves:

$y^2+2x-2y-3=0$ and the $y$-axis

(using horizontal & vertical strip)

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Finding the points:

$x = 0$ so $$ y^2+2(0)-2y-3=0 $$

$$ y^2-2y-3=0 $$

$$ (y-3)(y+1)=0 $$

Thus points $P$ are $(0,3),(0,-1)$.

By completing the square $y^2-2y+1=-2x+3+1$.

$$ (y-1)^2=-2(2x-2) $$

$ y=1, x=2 , V = (2,1) $

The parabola opens left.