if-1 and 2 are two zeroes of the polynomial 2x cube -x square -5x-2 find its third zero
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as the sum of cubic polynomial ax^3+ bx^2+cx+d=0 is -b/a
we can find third zero from here easily
here b= -1
a=2
so sum of zero is 1/2 or 0.5
now sum of two given zero is -1+2=1
to make it o.5
the third zero has to be -0.5 because
(-1)+(2)+(-0.5)=0.5
so the third zero is -1/2 or -0.5
we can find third zero from here easily
here b= -1
a=2
so sum of zero is 1/2 or 0.5
now sum of two given zero is -1+2=1
to make it o.5
the third zero has to be -0.5 because
(-1)+(2)+(-0.5)=0.5
so the third zero is -1/2 or -0.5
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