Question

Find each of the following products:
(i) (– 8) × (–10) × 9
(ii) (–10) × (–2) × (–5) × 7
(iii) (–10) × (–5) × (– 1) × (– 2)

Answer 1

HEY THERE!!!

Question:-

Find each of the following products:

(i) (– 8) × (–10) × 9

(ii) (–10) × (–2) × (–5) × 7

(iii) (–10) × (–5) × (– 1) × (– 2)

Method Of Solution:-

Using Sum identity!!

(-) × (-) = +

(-)× (+) = +

Now, Consider on Question!!

(1) (-8) × (-10) × 9

=> 80× 9

=> 720

(2) (-10) × (-2) × (-5) × 7

=> 20 × (-5) × 7

=> -100 × 7

=> -700

(3) (-10) × (-5) × (-1) × (-2)

=> 50 × 2

=> 100

Answer 2

Here is your solution

we know that

(-) × (-) = +

(+) × (-) = -

(1) (-8) × (-10) × 9

     => 80× 9

     => 720

(2) (-10) × (-2) × (-5) × 7

      => 20 × (-5) × 7

      => -100 × 7

       => -700

(3) (-10) × (-5) × (-1) × (-2)

   => 50 × 2

   => 100

hope it helps you