Question

X2-9/4=0 na forma ax2+c=0

Answer 1

Olá!
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Resolução,

$\mathsf{x^2 - \dfrac{9}{4} = 0}$

$\mathsf{x^2 = \dfrac{9}{4}}$

$\boxed{\mathsf{x = \pm \dfrac{3}{2}}}$

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Abraços!

Answer 2

vamos lá...

$x^{2} - \frac{9}{4} =0 \\ \\ x^{2} = \frac{9}{4} \\ \\ x=\pm \sqrt{ \frac{9}{4} } \\ \\ x=\pm \frac{3}{2} \\ \\ S=\{- \frac{3}{2},+ \frac{3}{2} \}$