The answer is: " 125 " .
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Given: " 2x + 1 = 5 " ; what is the value of: " (x + 3) ³ " ?
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Start with: " 2x + 1 = 5 " ; and solve for "x" ?
→ 2x + 1 = 5 ;
Subtract "1" from EACH SIDE of the equation:
→ 2x + 1 − 1 = 5 − 1 ;
to get:
→ 2x = 4 ;
Divide EACH SIDE of the equation by "2" ; to isolate "x" on one side of the equation ; and to solve for "x" ;
2x / 2 = 4 / 2 ;
x = 2 .
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Now, plug in "2" for "x" in the expression:
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→ " (x + 3)³ " ; and simplify the expression ;
→ (2 + 3)³ = 5³ = 5 * 5 * 5 = 25 * 5 = 125 .
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The answer is: " 125 " .
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