Question

2x ao quadrado -7x+3

Answer 1

2x²-7x+3
Delta=b²-4ac
Delta=(-7)²-4(2.3)
Delta= 49 - 24
Delta = 25

x' = -b+raiz de delta/2.a
x'= +7+5/2(2)
x'= +12/4
x'= 3

x''= -b-raiz de delta/2.a 
x''= +7-5/4
x''= 2/4
x''= 1/2