Question

find the quadratic equation whose roots are - 5 and minus - 11

Answer 1

sum of zeros = -5+(-11)=-16

product of zeros = -5*-11=55

quadratic equation = x²-16x+55

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Answer 2

since roots are x= -5 and x=-11
therefore (x+5)(x+11)=0
solving above,

x^2 +16.x+55=0

x square+16 x +55=0 is the right answer