Question

Which of the following does NOT have two
integer roots: (NOTE: "X2" IS "X SQUARED)
a. x2-2x
b. x2-1
c. x2-2x-1
d. x2-3x-4
e. x2-4x-3

Answer 1

just factor them all and you'll see that x^2 - 4x - 3 cannot be factored with real roots

Answer 2

How do you factor them?

Answer 3

x^2 - 2x can be factored to x(x-2) so its roots are 0 and 2

x^2 - 1 can be factored to (x-1)(x+1) so its roots are 1 and -1

x^2 -2x +1 can be factored to (x-1)(x-1) so it has just one root, 1

x^2 - 3x -4 can be factored to (x-4)(x+1) so its roots are 4 and -1

Answer 4

thanks so much!!!!

Answer 5

you're welcome!