Identify expression: Identify the expression to be evaluated. The expression given is (1+2)², which means we need to calculate the square of the sum of 1 and 2.Calculate sum: Calculate the sum inside the parentheses. (1+2) = 3 We add the numbers inside the parentheses to get the sum before squaring it.Square sum: Square the sum. (1+2)² = 3² Now we need to square the sum we found in Step 2.Evaluate result: Evaluate the square of 3. 3² = 3 × 3 = 9 Multiplying 3 by itself gives us the square of 3.

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$(1+2)^2=$

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Grade 8

Powers with negative bases

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(1+2)^2=

Identify expression: Identify the expression to be evaluated. $\newline$ The expression given is $(1+2)^2$ , which means we need to calculate the square of the sum of $1$ and $2$ .
Calculate sum: Calculate the sum inside the parentheses. $\newline$ $(1+2) = 3$ $\newline$ We add the numbers inside the parentheses to get the sum before squaring it.
Square sum: Square the sum. $\newline$ $(1+2)^2 = 3^2$ $\newline$ Now we need to square the sum we found in Step $2$ .
Evaluate result: Evaluate the square of $3$ . $\newline$ $3^2 = 3 \times 3 = 9$ $\newline$ Multiplying $3$ by itself gives us the square of $3$ .