alecball2001
alecball2001 alecball2001
  • 12-11-2018
  • Mathematics
contestada

What are the solutions to (x+7)^2=81

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gmany
gmany gmany
  • 12-11-2018

[tex](x+7)^2=81\iff x+7=\pm\sqrt{81}\\\\x+7=-9\ \vee\ x+7=9\qquad\text{subtract 7 from both sides}\\\\\boxed{x=-16\ \vee\ x=2}[/tex]

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suspho
suspho suspho
  • 12-11-2018

(x + 7)² = 81

x + 7 = √81

x+7 = 9

x = 9 - 7

x = 2

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