Question

If x = -2 then find the value of the polynomial x² + 5x -10.​

Answer 1

Answer:

-16

Step-by-step explanation:

put x= -2 in the equation

thus we get (-2)²+5×-2–10

=4 –10–10=-16

Answer 2

If x = - 2 then find the value of the polynomial x² + 5x - 10 is - 16

Given :

The x² + 5x - 10

To find :

The value of the polynomial x² + 5x - 10 when x = - 2

Solution :

Step 1 of 2 :

Write down the given polynomial

Let p(x) be the given polynomial

Then we have

p(x) = x² + 5x - 10

Step 2 of 2 :

Find the value of the polynomial when x = - 2

The value of the polynomial when x = - 2

$\sf= p(-2)$

$\displaystyle \sf{ = {( - 2)}^{2} + 5 \times ( - 2) - 10 }$

$\displaystyle \sf{ = 4 - 10 - 10 }$

$\displaystyle \sf{ = - 16 }$

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