Mathematics
02.01.2021 13:28
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What are the zeros of the polynomial function f(x)=x^3-5x^2-6x ?

What are the zeros of the polynomial function f(x)=x^3-5x^2-6x ?
What are the zeros of the polynomial function f(x)=x^3-5x^2-6x ?
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fmyear12
fmyear12
5,0(48 marks)

Option C

The zeros of the polynomial function f(x) = x^3 - 5x^2 - 6x is x = 0 and x = -1 and x = 6

Solution:

Given that polynomial function is f(x) = x^3 - 5x^2 - 6x

We have to find the zeros of polynomial

To find zeros, equate the given polynomial function to 0. i.e f(x) = 0

x^3 - 5x^2 - 6x = 0

Taking "x" as common term,

x(x^2 - 5x - 6) = 0

Equating each term to zero, we get

x=0 \text { and } x^{2}-5 x-6=0

Thus one of the zeros of function is x = 0

Now let us solve x^{2}-5 x-6=0

We can rewrite -5x as -6x + x

x^2 + x - 6x - 6 = 0

Taking "x" as common from first two terms and -6 as common from next two terms

x(x + 1) -6(x + 1) = 0

Taking (x + 1) as common term,

(x + 1)(x - 6) = 0

x + 1 = 0 and x - 6 = 0

x = -1 and x = 6

Thus the zeros of given function is x = 0 and x = -1 and x = 6

sweetgigi4387
sweetgigi4387
4,9(38 marks)

Step-by-step explanation:

Area if the rectangular pool= 10m×7m×8m

= 560m³

3/4 of 560m³

3/4×560

= 420

Hence , the water occupies 420m³ place

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