Question

-2x^2+6x+8=0 me ajudem pfv

Answer 1

x^2 - 3x - 4 = 0

x^2 + x - 4x - 4 = 0

x.(x + 1) - 4(x+1) = 0

(x+1) . (x - 4) = 0

x + 1 = 0

x - 4 = 0

x = -1

x = 4

x1 = -1, x2= 4