Question

Which of the following does NOT have two
integer roots:
a. x^2-2x
b.x^2-1
c.x^2-2x-1
d.x^2-3x-4
e.x^2-4x-3

Answer 1

a has roots x =2, x=0
b has roots x= 1, x=-1
c has roots x =2.41 x=-0.41
d has roots x = 4 , x =-1
e has roots x =4.64, x = -0.65

So your answer would be c and e...... Is there only one choice? by the way you should practice factoring using the quadratic equation is not as challenging as you think, it just looks scary
\[-b \pm \sqrt{b ^{2}-4ac}/ 2a\]