Question

if 1 and -2 are two zeroes of the polynomial x cube -4x square -7x +10. find its third zero

Answer 1

hey here is your answer

The third zero is 5

Hope it may helpful to you
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Answer 2

hey your answer is here/////////

let the third zero is y(sigma)
then,,a=1 b=-2 y=?
again,
a+b+y=-b/a
1+(-2)+y=-(-4)/1
-1+y=4
y=4+1=5
y=5

that's all.