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13-11-2019
Mathematics

contestada

Simplify: (3x2 − 5x + 9) + (7x2 + 8x − 15)

A. 10x2 + 3x − 6
B. 10x2 − 3x − 6
C. 10x2 + 3x + 6
D. 10x2 − 3x + 6

Respuesta :

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13-11-2019

Answer:

The correct answer is A. 10x² + 3x - 6

Step-by-step explanation:

Let's simplify (3x2 − 5x + 9) + (7x2 + 8x − 15) :

(3x2 − 5x + 9) + (7x2 + 8x − 15)

3x2 − 5x + 9 + 7x2 + 8x − 15 (Opening the parenthesis)

3x² + 7x² - 5x + 8x + 9 - 15 (Aligning similar terms)

10x² + 3x - 6

The correct simplified form is A. 10x² + 3x - 6

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