Question

pls..................​

Answer 1

Răspuns:

Explicație pas cu pas:

aplici formula distantei intre puncte

(x-4)²+(3-(-1))²=(4√5)²

(x-4)²+16=16*5

(x-4)²=16*4

x-4=4*2=8.....x=12

x-4= -4*2=-8........x=-4

x∈{-4;8}

interpretare geometrica, vezi atasamente

C (12;3) si B (-4;3)

Answer 2

C(x,3)D(4,-1)

CD=4√5

CD=√(x-4)²+(3+1)²=√x²-8x+16+16=>

x²-8x+32=(4√5)²

x²-8x+32-16×5=0

x²-8x-48=0

x1=-4. x2=12