Use the grouping method to factor 4x3 + 20x2 – 3x - 15. A. (x+ 5)(4x2 – 3) B. 2x(x + 1)(2x - 15) C. (x - 5)(4x2 + 3) D. (x2 - 5)(4x+3)

asked May 28, 2020 200k views

4 votes

Use the grouping method to factor 4x3 + 20x2 – 3x - 15.

A. (x+ 5)(4x2 – 3)
B. 2x(x + 1)(2x - 15) C. (x - 5)(4x2 + 3)
D. (x2 - 5)(4x+3)

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3 votes

Answer: A.

Explanation:

Rebagliatte answered May 30, 2020

6.8k points

2 votes

Answer:

A. (x + 5)(4x^2 - 3).

Explanation:

4x^3 + 20x^2 – 3x - 15.

= 4x^2( x + 5) - 3(x + 5)

= (4x^2 - 3)(x + 5).

Reznoir answered Jun 4, 2020

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