Answer:
-80
Explanation:
5x² + 20x - 60 = 0
5(x² + 4x) - 60 = 0
5[x² + 2(x)(2) + 2² - 2²] - 60 = 0
5(x - 2)² - 5(4) - 60 = 0
5(x - 2)² - 20 - 60 = 0
5(x - 2)² - 80 = 0
q=-5(x-p)^2
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