kuadrat sempurna dari 4x^2-3x-10=0

4x²-3x-10=0
4x²-3x=10
(2x-(3/4))²-(9/16)=10
(2x-(3/4))² = 10+(9/16)
(2x-(3/4))² = 169/16
(2x-(3/4)) = ±13/4
2x-(3/4) = 13/4  atau  2x-(3/4) = -13/4
2x = 13/4+3/4            2x = -13/4+3/4
2x = 4                      2x = -10/4
x = 2                          x = -5/4