Respuesta :

thetide5

Answer: 3x^2 - 16x + 15

Step-by-step explanation:

5x * 3x = 15x^2

-7 * 3x = -21x

5x * 1 = 5x

-21x + 5x = -16x

5x^2 - 17x^2 + 15x^2 = -12x^2 + 15x^2 = 3x^2

13x - 7x - 22x = 6x - 22x = -16x

- 4 + 19 = 15

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3x^2 - 16x + 15