Free Practice Question
PS · Problem Solving
sub-505
Algebra
If a + b = 15, and ab = 50. What is the value of ?
Answer Choices
Correct answer marked belowA
175
125
Correct
C
75
D
225
E
100
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Explanation
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Official Explanation
Official
To find the value of a^2 + b^2, we can use the identity: . We know that a + b = 15 and ab = 50. First, we calculate [m](a + b)^2: (15)^2 =…
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Comments
7
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S
SiddharthFeb 26, 2025
good question
M
MuhammadFeb 25, 2025
Greatt
S
SherveerMar 14, 2025
Great question!
T
TANVIApr 15, 2025
Thank for sharing!!!
L
LakshyaMar 19, 2025
Tricky wording but good practice
H
HarryJul 5, 2024
Thank you very much!
G
GuidoFeb 19
ok!
What 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