Question

conta da questão: y=x2-7x+10

Answer 1

y=x²-7x+10

x² -7x +10=0

a=1
b=-7
c=10

Δ=b²-4ac
Δ=(-7)²-4(1)(10)
Δ=49-40
Δ=9

x=(-b±√Δ)/2a

x=[-(-7±√9)2= (7±3)/2

x'=(7+3)/2=10/2=5

x"=(7-3)/2= 4/2=2

S= { 2,5}