Question

Encontre as rairaizes das equações X2-8x+7=0

Answer 1

x²-8x+7=0

A; 1 B; -8 C; 7

Δ=b²-4.a.c

Δ=(-8)²-4.1.7

Δ=64-28

Δ=36

-b+-√Δ/2.a

X= 8+-6/2

X'= 8+6/2

X'= 14/2

X'= 7

----------------------------

X"= 8-6/2

X"= 2/2

X"= 1