Question

The integer whose product with -1 is -40 is
a) 20
b) -20
c) -40
d) 40​

Answer 1

Answer:

d) 40

Explanation:

$40 \times - 1 = - 40$

Answer 2

Answer : 40

Step by step solution :

Let the integer be x so according to the given question we get ,

=> x × - 1 = - 40

=> - x = - 40

=> x = $\sf\dfrac{-40}{-1}$

=> x = 40

The question is solved using contradiction method