Question

4x2+4x-15+0
me ajudem :/

Answer 1

delta = 16 + 240
delta = 256
x = -4 +-raiz de 256/8
x = -4+- 16/8
x´=-4+16/8 =12/8 = 3/2
x´´ = -4-16/8 = -20/8 = -5/2