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Evaluate the expression 4x^(2) for x=3.

Evaluate the expression 4x2 4 x^{2} for x=3 x=3 .

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Cube roots of positive perfect cubesright chevron icon

Full solution

Q. Evaluate the expression 4x2 4 x^{2} for x=3 x=3 .
  1. Identify given value: Identify the given value for xx, which is x=3x = 3. We need to substitute this value into the expression 4x24x^{2}.
  2. Substitute xx with 33: Substitute xx with 33 in the expression 4x24x^{2}.\newline4x24x^{2} becomes 4×324 \times 3^{2}.
  3. Calculate 33 squared: Calculate the value of 323^{2}, which is 3×33 \times 3.\newline32=93^{2} = 9.
  4. Multiply by 44: Multiply the result from Step 33 by 44 to get the final value of the expression. 4×9=364 \times 9 = 36.

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