Question

find the product 7x(5x-2)​

Answer 1

Answer:

-70

Step-by-step explanation:

=7×(5×-2)

=7×-10

=-70

Answer 2

To find :  product of $7x (5x -2 )$

solution:

• Multiplication is a process of repetitive addition of integers.

• Multiplication rules for integers :

1. If two negative integers are multiplied then the product obtained is positive integer. i.e. $(-) \times(-)=+$
2. If one negative and one positive integers are multiplied then the product obtained is negative integer. i.e. $(-) \times(+)=-$
3. If both positive integers are multiplied then the product obtained is positive integer. i.e. $(+) \times(+)=+$

• Therefore according to above rule we solve  

• $7x (5x -2 )$

       $= 35x^{2} -14x$  

Hence,   product of $7x (5x -2 )$ is   $35x^{2} -14x$ .