Question

Using identities find the value of each of the following
( 67 )^​

Answer 1

Answer:

9a=76

2

−67

2

We know that, a

2

—b

2

=(a+b)(a—b)

By using this formula,

9a=(76+67)(76−67)

9a=143×9

a=

9

143×9

=143