Select all the expressions that cannot be factored using integral coefficients and integral constants

25x^2-40x+16

2x^2+x+4

6x^2-2x-20

X^2-2x-4

Question

Mathematics

Tamara Stein

28 June, 15:40

Select all the expressions that cannot be factored using integral coefficients and integral constants

25x^2-40x+16

2x^2+x+4

6x^2-2x-20

X^2-2x-4

+4

Answers (1)

Know the Answer?

Gizmo · Answer 1

25x^2 - 40x + 16 = 25x^2 - 20x - 20x + 16 = 5x (5x - 4) - 4 (5x - 4) = (5x - 4) (5x - 4)

2x^2 + x + 4 cannot be factored.

6x^2 - 2x - 20 = 6x^2 - 12x + 10x - 20 = 6x (x - 2) + 10 (x - 2) = (6x + 10) (x - 2)

x^2 - 2x - 4 cannot be factored using integral coefficients and integral constants.

Select all the expressions that cannot be factored using integral coefficients and integral constants25x^2-40x+162x^2+x+46x^2-2x-20X^2-2x-4

Select all the expressions that cannot be factored using integral coefficients and integral constants

25x^2-40x+16

2x^2+x+4

6x^2-2x-20

X^2-2x-4