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Find the distance between K(0,-1) to the line whose equation is y = 2x + 4 1

User Long Short
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\frac2\cdot0+(-1)\cdot(-1)+4{\sqrt[]{2^2+(-1)^2}}=\frac{5}{\sqrt[]{5}}=\sqrt[]{5}

Find the distance between K(0,-1) to the line whose equation is y = 2x + 4 1-example-1
Find the distance between K(0,-1) to the line whose equation is y = 2x + 4 1-example-2
User Pillmuncher
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