Question

2x²-7x=15 alguem sabe

Answer 1

2x^2-7x=15
2x^2-7x-15=0
delta=b^2-4ac
delta=(-7)^2-4.2.(-15)
delta=49+120
delta=169
x=-b-/+ raiz de delta/2a
x=-(-7)-13/2.2
x=7-13/4
x=-6/4 (:2)
x=-3/2
x=-(-7)+13/2.2
x=7+13/4
x=20/4
x=5