Question

f(x)= x2 - 7x + 10 alguém sabe a resposta?

Answer 1

x²-7x+10
∆=b²-4*a*c
∆=(-7)²-4*1*10
∆=49-40
∆=9
√∆=3

X1/2=-(b+-√∆)/2*a
X1/2=-(-7)+-3/2*1
X1/2=(7+-3)/2
X1=7/2

X2=4/2
x2=2...