Question

For each expression below, select the letter that corresponds to the equivalent expression from the given list.

Answer 1

Answer:

1. B

2. D

3. A

Step-by-step explanation:

1. (4x³ - 4 + 7x) - ( 2x³ - x - 8)

= 4x³ - 4 + 7x - 2x³ + x + 8

= 4x³ - 2x³ + 7x + x + 8 - 4

(Because of minus multiplied by bracket)

= 2x³ + 8x + 4

= B

2. (-3x² + x⁴ + x) + (2x⁴ - 7 + 4x)

= -3x² + x⁴ + x + 2x⁴ - 7 + 4x

= x⁴ + 2x⁴ - 3x² + x + 4x - 7

= 3x⁴ - 3x² + 5x -7

= D

3. (x² - 2x)(2x+3)

= 2x³ + 3x² - 4x² - 6x

= 2x³ - x² - 6x

= A

Hope this helps.