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

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

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Cube roots of positive perfect cubes

Full solution

Q. Evaluate the expression

4 x^{2}

for

x=3

.

Identify given value: Identify the given value for $x$ , which is $x = 3$ . We need to substitute this value into the expression $4x^{2}$ .
Substitute $x$ with $3$ : Substitute $x$ with $3$ in the expression $4x^{2}$ . $\newline$ $4x^{2}$ becomes $4 \times 3^{2}$ .
Calculate $3$ squared: Calculate the value of $3^{2}$ , which is $3 \times 3$ . $\newline$ $3^{2} = 9$ .
Multiply by $4$ : Multiply the result from Step $3$ by $4$ to get the final value of the expression. $4 \times 9 = 36$ .

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