Question

a equaçao 2x ao quadrado -10-8x=0 é ?

Answer 1

2x^2 -10- 8x=0
2x^2 -8x-10=0
delta= -8^2 -4*2*-10
d= 64+80
d= 144
x'= -(-8 +ou -v144/4
x'= 8+ 12/4=> x'= 20/4=>x'=5
x"= 8-12/4=>x"=-4/4=>x"=-1

Answer 2

Lembrando que o a=2  b=-10  c=-8


$2x^{2} -10-8x=0= \Delta= b^{2} -4.a.c= \Delta= 10^{2} -4.2.(-8)= \Delta=100+64=164  x^{1} =-10-+ \sqrt{164} /4 x^{2} =-10-+ \sqrt{164} /4$



Espero ter ajudado