What was Steve's error when expanding the equation 5(X + 2) = 47?
GCSE Secondary Maths Age 13-17 - Algebra: Algebra - Explained

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Mathematics
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10th - 12th Grade
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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
He subtracted 2 instead of adding.
He did not multiply 5 by 2.
He forgot to multiply 5 by X.
He added 2 instead of multiplying.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the correct first step in solving the equation 3X^2 + 8 = 83?
Divide both sides by 3.
Add 8 to both sides.
Multiply both sides by 3.
Subtract 8 from both sides.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What mistake did Liz make when solving for X in the equation 3X^2 = 75?
She forgot to square the result.
She did not divide by 3.
She only considered the positive square root.
She added 8 instead of subtracting.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
When taking the square root of a number, what should you remember?
Only the positive value is valid.
Neither value is valid.
Only the negative value is valid.
Both positive and negative values are valid.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a useful strategy for identifying mistakes in a friend's math solution?
Rely on their calculations.
Rework the problem independently.
Ask someone else to solve it.
Ignore the problem.
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