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What is the value of the expression below when 
w=3 ?

3w^(2)-8w+7
Answer:

What is the value of the expression below when w=3 w=3 ?\newline3w28w+7 3 w^{2}-8 w+7 \newlineAnswer:

Full solution

Q. What is the value of the expression below when w=3 w=3 ?\newline3w28w+7 3 w^{2}-8 w+7 \newlineAnswer:
  1. Substitute value of ww: Substitute the value of ww into the expression.\newlineWe are given w=3w=3, so we substitute 33 for ww in the expression 3w28w+73w^{2}-8w+7.\newline3(3)28(3)+73(3)^{2}-8(3)+7
  2. Calculate square of w: Calculate the square of ww, which is 33 in this case.\newline(3)2=3×3=9(3)^{2} = 3 \times 3 = 9
  3. Multiply result by 33: Multiply the result from Step 22 by 33. \newline3×9=273 \times 9 = 27
  4. Multiply 88 by w: Multiply 88 by ww, which is 33. \newline8×3=248 \times 3 = 24
  5. Combine and add 77: Combine the results from Step 33 and Step 44 and add 77. 2724+727 - 24 + 7
  6. Perform subtraction and addition: Perform the subtraction and addition to find the final value.\newline2724=327 - 24 = 3\newline3+7=103 + 7 = 10

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