Question

Resolver: $c^{2}+20c-144$

Answer 1

Respuesta:

c1=$2\sqrt{61}-10$=5.620499352

c2=$=-10-2\sqrt{61}$=-25.62049935

Explicación paso a paso:

$c=\frac{-20+\sqrt{20^{2} -4*(-144)} }{2} =\frac{-20-\sqrt{20^{2} -4*(-144)} }{2}$

$c=\frac{-20+\sqrt{400+576} }{2} =\frac{-20-\sqrt{400+576} }{2}$

$c=\frac{-20+4\sqrt{61} }{2} =\frac{-20-4\sqrt{61} }{2}$

$c=\frac{4\sqrt{61}-20 }{2} =\frac{-20-4\sqrt{61} }{2}$

$c=2\sqrt{61}-10=-10-2\sqrt{61}$

c1=$2\sqrt{61}-10$=5.620499352

c2=$=-10-2\sqrt{61}$=-25.62049935