Select all the expressions that cannot be factored using integral coefficients and integral constants. 6 x2 - 2 x - 20 x2 - 2 x - 4 25 x2 - 40 x + 16 2 x2 + x + 4

The expressions that cannot be factored using integral coefficients and integral constants is the below:

d. 2x2 + x + 4

b. x2 - 2x - 4

For c. 25x2 - 40x + 16 the factors are (5x – 4) (5x – 4)

For a. 6x2 - 2x - 20 the factors are (2x - 4) (3x + 5)

answer: 1 2 3 6

step-by-step explanation:

1x6=6 2x3=6

at least two

step-by-step explanation: