r/CasualMath • u/Perfect_Tap_7435 • 3d ago

Tricky one

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18 Upvotes

95% Upvoted

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u/Repulsive_Tough1037 2d ago
  1. (3 + ...)*(3 - ...) = 1
  2. (5x+3)^2 = (5x+4)*(5x+2) + 1
  3. so the whole expression is simplified to (3 - ...)^1
  4. integral is resolved as (3 - ...)x on interval (3 + ...) .. 0. so it's (3 - ...)*(3 + ...) = 1

1

u/Perfect_Tap_7435 2d ago

well done 😀