Question

{x²+xy=119}
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{y-x=3}

Answer 1

Olá,
x²+xy= 119
y-x= 3
y= 3+x
x²+x(3+x)= 119
x²+3x+x²-119 = 0
2x²+3x-119= 0
∆= 3²-4.2.-119
∆= 9+ 952
∆= 961
x= -3±31/4
x'= 28/4 = 7
x"= -34/4 = 17/2
p/ x= 7
y= 3+7
y= 10
p/x = 17/2
y= 3+17/2
y= 23/3
espero ter ajudado