Question

Đố ai làm được bài nay:

Tính nhanh:

\(\frac{8x75x3+6x25x4-240}{15x2x6+18x16x5}\)
 

Answer 1

\(\frac{8x75x3+6x25x4-240}{15x2x6+18x16x5}\)

=\(\frac{2x4x5x5x3x3+2x3x5x5x4-3x2x4x2x5}{3x5x2x2x3+3x2x3x2x2x4x5}\)

=\(\frac{2x3x4x5x\left(5x3+5-2\right)}{3x2x3x5x2x\left(1+2x4\right)}\)

=\(\frac{2x18}{3x9}\)

=\(\frac{4}{3}\)