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A=(3; 4)
x=3
y=4
z²=x²+y²
z²=3²+4²
z²=9+16
z²=25
z=√25
z=5
b)
B=(1; 3)
x=1
y=3
z²=x²+y²
z²=1²+3²
z²=1+9
z²=10
z=√10
c)
C=(-8; 6)
x=-8
y=6
z²=x²+y²
z²=(-8)²+6²
z²=64+36
z²=100
z=√100
z=10
d)
D=(-3; -3)
x=-3
y=-3
z²=x²+y²
z²=(-3)²+(-3)²
z²=9+9
z²=18
z=√18
z=√(2·9)
z=3√2
e)
E=(12; -5)
x=12
y=-5
z²=x²+y²
z²=12²+(-5)²
z²=144+25
z=169
z=√169
z=13