Question

If 1and-2 are the zeroes of the polynomial x to power 3-4x to power 2-7x+10 find its third zero

Answer 1

Hey!


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Refer the pic for answer.

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Hope it helps...!!!

Answer 2

Hello friend your answer is :

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Given that,

Two zeroes of a cubic p(x) => 1 and -2

Find other third zero => ?

$p(x) \: = 3to \: power \: 3 - 4 {x}^{2} - 7x + 10$

We know that,

In case of cubic polynomial,

=>Sum of zeroes = 1st zero + 2nd zero+ 3rd zero

=> 1+(-2)+ 3rd zero = -b/a

=>1-2 + 3rd zero = -(-4)/1

=>-1 + 3rd zero = 4

=> 3rd zero = 4 + 1 = 5

Your answer is 5.

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..Thanks


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