Question

me ajudem ou me explique.​

Answer 1

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$\dfrac{x {}^{2} + 1 }{2} - \dfrac{3 - x {}^{2} }{10} = 1 - \dfrac{x {}^{2} }{5}$

5(x²+1)-(3-x²)=10-2x²

5x²+5-3+x²=10-2x²

6x²+2=10-2x²

6x²+2x²=10-2

8x²=8

$x {}^{2} = \frac{8}{8}$

x²=1

x=±√1

x=±1

s={-1,+1}