Find the value of p and q
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x2+px-4 = 0
put x=-4 it will satisfy the eqn as it is root
16-4p-4=0
4p=12 => p = 3
x2+px+q=0 has equal roots means D=0 i.e
b2-4ac =0
p2-4q=0
9-4q=0. (p= 3)
q= 9/4 or 2.25
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