Question

Evaluate (-1) × (-2)×(-3)×(-4)×(-5)

Answer 1

SOLUTION

TO EVALUATE

$\sf{( - 1) \times ( - 2) \times ( - 3) \times ( - 4) \times ( - 5)}$

EVALUATION

$\sf{( - 1) \times ( - 2) \times ( - 3) \times ( - 4) \times ( - 5)}$

In above expression there are 5 negative signs

Now 5 is odd

We know that multiplication of odd number of negative signs gives negative sign

So the sign in resulting number is negative

Now

$\sf{( - 1) \times ( - 2) \times ( - 3) \times ( - 4) \times ( - 5)}$

$\sf{ = - (1 \times 2 \times 3 \times 4 \times 5)}$

$\sf{ = - ( 2 \times 3 \times 4 \times 5)}$

$\sf{ = - ( 6 \times 4 \times 5)}$

$\sf{ = - ( 24 \times 5)}$

$\sf{ = - 120}$

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Answer 2

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