Question

X ao quadrado - 7X+10=0

Answer 1

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)±√9/2.1
X=7±3/2
X'=7+3/2=10/2=5
X"=7-3/2=4/2=2

S={ 5 e 2 }