Question

if one of the zeroes of the polynomial p(x)=3x cube-2x square-mx+x is -1 then find the value of m+x
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Answer 1

Given :-

3x³ - 2x² - mx + x

One zero = -1

To Find :-

Value of m + x

Solution :-

Since, -1 is a zero

x = -1

Now, Putting x = -1 in the equation

3x³ - 2x² - mx + x = 0

3(-1)³ - 2(-1) - m(-1) + (-1) = 0

3(-1) - (-2) - (-m) - 1 = 0

-3 + 2 + m - 1 = 0

-4 + 2 + m = 0

-2 + m = 0

m = 0 + 2

m = 2

Now,

m + x

2 + (-1)

2 - 1

1