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Verified answer
(4a-3)(2a+1)8a² + 4a - 6a - 3
8a² - 2a - 3
p = 8
q = -2
r = -3
p+q+r = 8-(-2)+(-3) = 7
8a²-2a-3
p-q+r=8-(-2)+(-3)=7