If the roots of the quadratic equation x2 + p x + 16 = 0 are equal, then the value of p is
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when equation has equal root then
b^2-4ac=0
p^2-4*1*16=0
p^2-64=0
p=√64
p=8
so, equation=x^2+8x+16=0
x^2+4x+4x+16=0
(x+4)^2=0
x+4=0
x=-4
b^2-4ac=0
p^2-4*1*16=0
p^2-64=0
p=√64
p=8
so, equation=x^2+8x+16=0
x^2+4x+4x+16=0
(x+4)^2=0
x+4=0
x=-4
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