Question

Q12.Use suitable identity to solve the following. Also mention the identity used:

a) ( − 4)( − 2)

b) 297 X 303

​

Answer 1

Answer:

Step-by-step explanation:

a)

(−4)  

−2

=  

(−4)  

2

 

1

​

            ∵a  

−m

=  

a  

m

 

1

​

 

=  

−4∗−4

1

​

 

=  

16

1

​

 

∴(−4)  

−2

=  

16

1

​

b)

(297)(303)

=(300−3)(300+3)

Using ,

(a−b)(a+b)=a  

2

−b  

2

 we get,

(300)  

2

−(3)  

2

 

=90000−9

=89991

Answer 2

Answer:

a) =8

b) =89991

Step-by-step explanation:

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