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01-10-2016
Mathematics

Answered

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

A25x2 - 40x + 16
B2x2 + x + 4
C6x2 - 2x - 20
Dx2 - 2x - 4

Verified Answer :

Anonymous Anonymous

14-10-2016

The expressions that cannot be factored using integral coefficients and integral constants is the below:
b. 2x2 + x + 4
d. x2 - 2x - 4

For a. 25x2 - 40x + 16 the factors are (5x – 4) (5x – 4)
For c. 6x2 - 2x - 20 the factors are (2x - 4) (3x + 5)

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