zaq15diazlanie zaq15diazlanie

07-09-2017
Mathematics

contestada

Select all the expressions that cannot be factored using intergal coefficients and intergal constants
A. X^2 + 5x + 3
B. 25 - 20x + 4x^2
C. -2x^2 + 7x - 3
D. 2x^2 - 5x + 4

Respuesta :

choixongdong choixongdong

07-09-2017

cannot be factored

A. X^2 + 5x + 3
D. 2x^2 - 5x + 4

can be factored
B. 25 - 20x + 4x^2 = (5 -2x)^2
C. -2x^2 + 7x - 3 = -(x - 3)(2x - 1)

so answer
A. X^2 + 5x + 3
D. 2x^2 - 5x + 4

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