Question

the solution of (x+4) ^-(x-5) ^=9is
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Answer 1

Answer:

a²-b²= ( a+b)(a-b) This identity is used in this sum

a= x+4 , b= x-5

( x+4+x-5) ( x+4-x-5) = 9

( 2x - 1 ) ( -1) =9 ( now multiple the minus 1 )

-2x +1 = 9

-2x= 9-1

-2x = 8

-x = 8 /2

-x = 4

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