Question

Equação do 2 grau completa
y²-10y+9=0 respondam logo pfvvvvv

Answer 1

y^4 - 10y² + 9 = 0 y²=x

x²-10x+9=0

a=1 b=-10 c=9

x=(-10)²-4.1.9

x=100-36

x=64

x=-(-10)+-√64 / 2.1

x=10+-8 / 2

x¹=10+8/2

x¹=18/2

x¹=9

x²=10-8/2

x²=2/2

x²=1

Para x=9 Para x=1

y²=9 y²=1

y=+-√9 y=+-√1

y=+-3 y=+-1

s={3,-3,1,-1}