Question

2x2+x-78=0 aplicando bascara

Answer 1

2x²+x-78=0

Δ= 1²-4(2)(-78)
Δ= 625

X= -1 + √625
    ----------------
          2

x= -1 + 25
    ---------------
        2   

x1 = -26/2 = -13
x2 = 24/2 = 12