contestada





Factor the polynomial 3x4 – 2x2 + 15x2 – 10 by grouping.

Which product is the factored form of the polynomial?


(–x2 – 5)(3x2 + 2)

(x2 – 2)(3x2 + 5)

(x2 + 5)(3x2 – 2)

(3x2 – 5)(x2 + 2)

Respuesta :

The answer is C. (x2 + 5)(3x2 – 2)

Answer:

[tex](x^{2} + 5)(3x^{2} - 2)[/tex]

Step-by-step explanation:

The polynomial is first correctly stated as follows

[tex]3x^{4} - 2x^{2} + 15x^{2} - 10[/tex]

This is rearranged, grouped and solved as follows:

[tex]3x^{4} + 15x^{2} - 2x^{2} - 10[/tex]

[tex](3x^{4} + 15x^{2}) - (2x^{2} + 10)[/tex]

[tex]3x^{2} (x^{2} + 5) - 2(x^{2} + 5)[/tex]

Factorizing the common factors [tex](x^{2} + 5)[/tex], we have the product of the factored form of the polynomial as follows:

[tex](x^{2} + 5)(3x^{2} - 2)[/tex]

That is the third option in the question if rewritten in the correct form.