please answer this....
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Step-by-step explanation:
GIVEN
P = 3x² + 7x + 8
Q = 2x² + x - 9
R = -5x² - 8x +1
TO PROVE = P + Q + R = 0
= (3x² + 7x + 8) + (2x² + x - 9 )+ (-5x² - 8x +1 )
= 5x² - 5x² + 8x - 8x -1 + 1
= 0
HENCE,PROVED
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