Question

x²+2×-3=0 me ajudem​

Answer 1

Resposta:

x' = 1

x"= -3

Explicação passo-a-passo:

$x^2+2x-3=0\\\Delta=b^2-4*a*c\\\Delta=2^2-4*1*(-3)\\\Delta=4+12\\\Delta=16\\\\x'=\frac{-b+\sqrt{\Delta} }{2*a}= x'=\frac{-2+4}{2*1}= 1\\\\x"=\frac{-b-\sqrt{\Delta} }{2*a}= x"=\frac{-2-4}{2*1}= -3$