Question

$\binom{x \: 9}{4 \: x}$
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Determine o valor de x, usando a fórmula de bhaskara

Answer 1

$(x).(x)-(4).(9)$

$x^{2} -36$

a=1

b=0

c=-36

Δ=$b^{2} -4.a.c$

Δ=$0^{2} -4.1.-36$

Δ=$144$

$x1=\frac{-b+\sqrt{144}}{2.a} =\frac{-0+12}{2.1}= \frac{12}{2} = 6$

$x2=\frac{-b-\sqrt{144}}{2.a} =\frac{-0-12}{2.1}= -\frac{12}{2} = -6$