Select all the expressions that are equivalent to the polynomial below. - 15x^2-29x-12 (-17x2 + 2x - 3) + (2x2 - 31x - 9) (5x2 - 10x + 8) - (10x2 + 19x + 20) - 2 (7x + 1) - 5 (3x2 + 3x + 2) - 2 (4x - 15) - 3 (5x2 + 7x + 6) (-19x2 - 4x - 7) + (4x2 + 25x - 5) (-7x2 - 21x + 13) - (8x2 + 8x + 25)

Question

Mathematics

Andrea Shields

20 October, 18:17

Select all the expressions that are equivalent to the polynomial below. - 15x^2-29x-12 (-17x2 + 2x - 3) + (2x2 - 31x - 9) (5x2 - 10x + 8) - (10x2 + 19x + 20) - 2 (7x + 1) - 5 (3x2 + 3x + 2) - 2 (4x - 15) - 3 (5x2 + 7x + 6) (-19x2 - 4x - 7) + (4x2 + 25x - 5) (-7x2 - 21x + 13) - (8x2 + 8x + 25)

+4

Answers (1)

Know the Answer?

Lance Taylor · Answer 1

1,3 and 5

Step-by-step explanation:

1) - 2 (7x + 1) - 5 (3x2 + 3x + 2)

= - 14x - 2 - 15x^2 - 15x - 10

= - 15x^2 - 29x - 12

2) (5x2 - 10x + 8) - (10x2 + 19x + 20)

= 5x^2 - 10x + 8 - 10x^2 - 19x - 20

= - 5x^2 - 29x - 12

3) (-7x2 - 21x + 13) - (8x2 + 8x + 25)

= - 7x^2 - 21x + 13 - 8x^2 - 8x - 25

= - 15x^2 - 29x - 12

4) (-19x2 - 4x - 7) + (4x2 + 25x - 5)

= - 15x^2 + 21x - 12

5) (-17x2 + 2x - 3) + (2x2 - 31x - 9)

= - 15x^2 - 29x - 12

6) - 2 (4x - 15) - 3 (5x2 + 7x + 6)

= - 8x + 30 - 15x^2 - 21x - 18

= - 15x^2 - 29x + 12