Question

Resolva as equações de 2 grau -x2-x+30=0

Answer 1

$-x^{2} -x+30 =0$

a=-1

b=-1

c=+30

Δ=$(-1)^{2} -4.-1.+30$

Δ=$1+120$

Δ=$121$

$x1=\frac{+1+\sqrt{121}}{2.-1} =\frac{1+11}{-2} =-\frac{12}{2} =-6$

$x2=\frac{+1-\sqrt{121}}{2.-1} =\frac{1-11}{-2} =\frac{10}{2} =5$