Question

find the value of k, in quadratic equation 9 x square - kx + 16 = 0 if roots are equal.​

Answer 1

Answer:

given equation is 9x^2-kx+16=0

a=9 b=-k c=16

for equal roots

b^2-4ac=0

(-k) ^2-(4*9*16)=0

k^2-576=0

k^2=576

k=√576

k=plus minus 24 ans...

Answer 2

describe the uses of the roots of the quadratic equation