Question

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Answer 1

2x^2-2x-24=0
delta=b^2-4.a.c
delta=(-2)^-4.2.(-24)
delta=4+192
delta=196
x=-b-/+ raiz de delta/2a
x=-(-2)-14/2.2
x=2-14/4
x=-12/4
x=-3
x=-(-2)+14/2.2
x=2+14/4
x=16/4
x=4
a.b-(a+b)
-3.4-(-3+4)
-12-(-1)
-12+1
-11