Question

3 x ao quadrado mais 7x igual a zero

Answer 1

3ײ-7×+4=0

formula de Bhaskara
Δ=(b)²-4 (a)(c)
Δ=(-7)² -4(3)(4)
Δ=49-48
Δ=1

×=-b±√Δ/2.a
×=-(7)±√1/2
×'=7+1/2
×'=4

×''=7-1/2
×''=3
espero ter ajudado