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blackpenredpen @[email protected]

1.4M subscribers - no pronouns :c

Sharing the fun of solving math problem!


04:28
cube roots of i
14:47
The most famous exponential equation x^2=2^x
16:50
I finally found the cubic vertex formula without calculus!
11:43
Making a cubic equation have a double root
20:37
5 Math Video Categories That Grew My Channel (12 Years on YouTube)
22:01
My first x^x congruence: x^x≡2 (mod5)
09:58
Can d^2y/dx^2=(dy/dx)^2?
14:39
The last question from the Berkeley mini Math Tournament (for 8th graders)
04:21
Which is bigger: a^3+b^3 or c^3?
10:42
"Dear Bprp, I have a pretty unusual question": If sqrt(a+sqrt(a+sqrt(a)))=128, then floor(a)=?
05:25:41
100 precalculus equations & inequalities (in one take)
22:31
"This fully tests your understanding of calc 1 differentiation & integration" Cambridge STEP 1 exam
11:53
This is how they asked complex number problems on the 2023 AS-Level further maths paper
05:38
This equation looks werid
08:19
Can we solve this square root equation?
12:19
A cubic formula that you probably haven't seen before!
09:23
I want a simple life, but WolframAlpha doesn't allow it!
09:29
If x^y=8 and x is bigger than 1, then what's the minimum of x+y=?
16:30
Pell's equation (Introduction & example) ft. @octopuskeng
04:13
Integral battle! 2024 vs 2025
12:59
You probably haven't solved a quartic equation like this before!
09:15
Finding the BIGGEST rectangle under y=x^3 (but NO calculus!)
06:29
A proof for sin(a+b) and cos(a+b) that you probably haven’t seen before
06:46
Solving x=sqrt(x-1/x)+sqrt(1-1/x) Math Stack Exchange
05:37
They didn't get this integral right, so here's the solution (Berkeley Math Tournament Integral bee)
08:02
Finding the domain of x^x
08:13
Math for fun: solving (4^x+8)^4-(8^x-4)^4=(4+8^x+4^x)^4
09:49
Solving x^5=1
07:57
You don't need calculus for this question
10:20
Can you solve these 3 calculus tiebreakers the fastest? (2023 Berkeley Math Tournament)
07:41
A non-real way of solving Fresnel's integrals (but I am not sure if it's legit)
12:17
What if we changed a Fresnel's integral?
08:48
In how many ways can we distribute 6 distinct balls into 3 identical boxes?
08:06
Solving improper integrals without actually solving them! (part 1)
09:50
Limit of ln(x)/W(x) as x approaches infinity (Lambert W function)
11:14
I used a double integral to solve a single improper integral
05:14
This limit has 0^0 indeterminate form but the answer is 0
09:45
How Cauchy would find the maximum of sqrt(x)+sqrt(y)
06:41
What is the equation of the line that’s equal-distance from two given points?
09:55
Is x^x=0 solvable?
08:39
Can we just keep taking the natural logarithm?
11:28
3 levels of "perpendicular"
11:06
Finding the distance from a point to a line (using vectors)
09:37
When you accidentally multiply matrices the way, but nobody notices (Reddit r/mathmemes)
09:03
Can we use power series for this limit of a two-variable function?
05:12
What is f''(x) in terms of dx/dy?
05:43
Quadratic formula but (a, b, c) goes to (0, 0, 0)
06:39
The most fun way of solving this quartic equation
09:10
Quadratic formula for non-constant coefficients
05:59
I finally took the limit of the quadratic formula
07:12
Solving the integral of ln(x) from 1 to ? is equal to 2
09:07
Oxford MAT asks: sin(72 degrees)
02:16
Meet the 94-year-old calculus teacher! @ycmathematicsphysicsandche5659
01:31:13
First time solving an A-Level maths exam! (90 minutes, uncut)
08:33
How to solve the three-circle problem from the 2022 GCSE math exam
09:35
This is how HKDSE asked a logarithm question (Hong Kong university entrance exam)
01:25:23
Solutions to the 2023 AP Calc AB FRQ
10:36
A circle tangents to a hyperbola! (Harvard-MIT math tournament)
24:38
Solving a deductive puzzle from Berkeley mini Math Competition
15:17
You see nonlinear equations, they see linear algebra! (Harvard-MIT math tournament)