Answers edited by Cri007

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• How do you solve #(5x - 25) ( x ^ { 2} + 10x + 21) = 0#?
  
• Question #3a275
  
• Question #67c01
  
• How do you factor #p^2-14p+49# using the perfect squares formula?
  
• How do you solve the system of equations #9x + 8y = 0# and #3x - 8y = - 48#?