anonymous
  • anonymous
how do I know if they are real numbers ? Solve. 4(a + 3) = 12 + 4a
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
what you mean is "how do you know if the solutions is ALL REAL NUMBERS ?
anonymous
  • anonymous
and you know that because if you multiply out on the left, you get \[4a+12\] by the distributive property, which is identical to the expression on the right of the equal sign
anonymous
  • anonymous
in other words, you are looking at \[4a+12=4a+12\] which is pretty clearly an "identity" true for all real numbers

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