Question

x+y=4 x²+y²=4x me ajudem ai galera por favorrrrrrrrrrrrr

Answer 1

x=4

y=0

x+y=4

x²+y²=4x                 y=4-x

y=4-x

x²+ (4-x)²

x²+x²-8x+16=4x

2x²-8x-4x+16=0

2x²-12x+16=0

bhaskara

b²-4*a*c

12²-4*2*16

144-128=16

x` = 12+4/4= 16/4= 4

x`` = 12-4/4=8/4=2

para x=4 temos y =

y=4-x

y=4-4

y=0

para x = 2 temos y= y=x-4 = y=2-4

y=-2