If p-15=0 and 2x^2+px+25=0,find value of x
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p=15
2x^2+15x +25=0
2x^2 +10x+5x+25=0
2x (x+5) +5 (x+5)=0
(x+5)(2x+5)=0
x= -5 or -5/2
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