Free Practice Question
PS · Problem Solving
sub-505
Algebra
If the total of the cubes of x and y equals 27 and , what is the value of ?
Answer Choices
Correct answer marked belowA
3/4
B
5/4
7/3
Correct
D
15/4
E
6
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Official Explanation
Official
We know that .
From the equation , we can factor it as .…
From the equation , we can factor it as .…
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Sign in to commentWhat this question tests
What it tests
Your ability to manipulate linear and quadratic expressions, substitute unknowns, and solve equations under time pressure.
Common trap
Losing a sign when moving terms across the equals sign, or dividing both sides by a variable that could equal zero.
Details
Difficulty
sub-505
Type
PS
Category