find the value of K,in quadratic equation 9Xsquare -kx+16=0.if roots are equal
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9x²-kx+16=0
Hear a=9 ,b=-k,c=16
given that root are equal then
b²-4ac=0
=>(-k)²-4×9×16=0
=>k²=4×144
=>k=2×12=+ or- 24
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