Question

7^993+9*7^991-7^992*8-7^991​

Answer 1

• 
  `7^(991)`

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To simplify the expression, use the rules of exponents.

Combine the terms with the same base and then factor out a common factor.

• 
  `7^(993)+9*7^(991)-7^(992)*8-7^(991)=`
• 
  `7^(991+2)+9*7^(991)-8*7^(991+1)-7^(991)=`
• 
  `49*7^(991)+9*7^(991)-7*8*7^(991)-7^(991)=`
• 
  `(49 + 9-56-1)*7^(991)=`
• 
  `1*7^(991)=`
• 
  `7^(991)`