Question

qual a resposta de t ao quadrado - 21 t =20?

Answer 1

$t^{2}$-21t-20=0

delta= $b^{2}$-4(a)(c)
delta=441-4(1)(-20)
delta=441+80
delta=521

t= -b+/-$\sqrt{delta}$/2a
t= 21+/-$\sqrt{521}$/2
t1= 21+$\sqrt{521}$/2
t2= 21-$\sqrt{521}$/2

Answer 2

-21t=20
t= 21+20
t= 41