Question

7x²-13x-2=0
e preciso da respopsta hoje

Answer 1

7x²-13x-2=> 0

↓ DELTA ↓

B²-4A.C

(13)²-4.7(-2)

169+56

∆:.√225

∆:.15

////////////////////////////////////////

↓ RAÍZES ↓

-(-13)±15/2.7

X'=>13+15/14=>28/14=> (2)

X"=>(13-15)/14=>-2/14={-0,1429}

S:.{ 2 e -0,1429}

_______________


boa tarde!! :)