Question

x²-3-28=0 qual er a resposta?

Answer 1

Delta=9-4*1*(-28)
=9+4*28
=121


X=(3 +/- raizq(121))/2
x1=(3+11)/2
x1=7

X2=(3-11)/2
x2=-8/2
x2=-4


X1 = 7 X2 = -4