a: d1 vuông góc d

=>d1: 4x+y+c=0

Thay x=2 và y=-3 vào d1, ta được:

c+8-3=0

=>c=-5

b: d2//d

=>d2: -x+4y+c=0

Thay x=2 và y=-3 vào d2, ta được:

c-2-12=0

=>c=14

c: \(d\left(E;\left(d\right)\right)=\dfrac{\left|2\cdot\left(-1\right)+\left(-3\right)\cdot4-1\right|}{\sqrt{1^2+4^2}}=\dfrac{15}{\sqrt{17}}\)

Phan, sao lắm miu thế nhỉ??

ko biết cung song tử có hợp với cung bọ cạp ko nhỉ

Ckao mii, mk là Rin, cung Song Ngư, hân hạnh đc lw vs bạn ^^

P/s:cho hỏi bạn k?

a: \(=\dfrac{x+1+1}{x+2}=1\)

b: \(=\dfrac{3x-7+3x+7}{6}=x\)

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