Question

please give answer it very urgent ​

Answer 1

Step-by-step explanation:

Given:

P = 3x² + 7x + 8

Q = 2x² + x - 9

R = -5x² - 8x + 1

To prove:

P + Q + R = 0

Solution:

(3x² + 7x + 8) + (2x² + x - 9) + (-5x² - 8x + 1)

› 3x² + 7x + 8 + 2x² + x - 9 - 5x² - 8x + 1

› 5x² - 5x² + 8x - 8x + 8 - 8

• [+ , - get cancelled]

› 0

∴ P + Q + R = 0

Answer 2

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