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Fast Math - Random Quadratic Equations
Can you solve these random quadratic equations? The equations change every time!
Enter the two solutions in either order.
Answer must correspond to highlighted box!
All solutions are integers.
If this is too fast, you can always try the
15 Minute Version
so you're not time pressured.
Quiz by
Stewart
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Last updated: September 26, 2019
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First submitted
September 26, 2019
Times taken
1,616
Average score
80.0%
Rating
5.00
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Equation
Solutions
x² - 3x - 10
-2 and 5
x² - 14x + 40
4 and 10
x² - 9x + 18
3 and 6
x² + 10x + 25
-5 and -5
x² - x - 30
-5 and 6
Equation
Solutions
x² + 19x + 84
-7 and -12
x² - 9x - 90
-6 and 15
x² - 7x + 6
1 and 6
x² - 2x - 24
-4 and 6
x² - 15x + 54
6 and 9
Equation
Solutions
x² - 4x - 12
-2 and 6
x² + 4x + 4
-2 and -2
x² + 12x + 20
-2 and -10
x² - 6x + 9
3 and 3
x² + 20x + 75
-5 and -15
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Fast Math - Addition
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Category Elimination - Numbers
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6 Comments
Show comments >
scambigol
+2
Level 78
Sep 27, 2019
nice, I enjoyed that!
Charon3000
+4
Level 51
Dec 7, 2020
Really nice idea!
But pay attention to the signs, they're wrong more often than not.
stylus
+4
Level 78
Oct 10, 2021
it's a shame there's no way to require the taker to get the right signs - typing positive integers always gives it to you. oh well, fun quiz nonetheless, challenging to do under time pressure but not complaining
akjlddkjslfsd
+1
Level 50
Mar 13, 2022
It's easy once you know how to factorize
EnlightWolif
+1
Level 48
Mar 16, 2024
agree. but doing quad. equations in one's head is an interesting exercise
Dollyfroggy
+1
Level 63
Apr 21, 2022
Good job! Too bad signs don't work.
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But pay attention to the signs, they're wrong more often than not.