Question

y=x²-7x+10 calcule, y=0, quanto vale x?

Answer 1

x2-7x+10
a=1
b= -7
c=10
DELTA: (-7) AO QUADRADO - 4 X  1 X 10
DELTA: 49-10
DELTA: 9
X=(-7)-√9
¬¬¬¬¬¬¬¬¬
    2
X= (-10)


X=(-7)-√9
··················
          2
 X=  ( -5)