can anyone this ques
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X^2 + bx +12=0
2 is a root of this equation
2 satisfies the equation
(2)^2 +b(2)+12=0
4+2b+12=0
2b=-16
b=-8
X^2 + bx+q=0 has equal roots
X^2 -8X+q=0
if root is a then sum of roots =a+a=2a=- b/a=-(-8)/1=8
a=4
root is 4
4 satisfies the equation
(4)^2 -8×4 +q=0
16-32+q=0
q=16
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