Question

$frac{ sqrt{28} - 2 sqrt{2a} }{10a - 35}$ сократить

Answer 1

  √4*√7- 2√2a            2√7-2√2a                     2(√7-√2a)                               =____________=_______________=       __________________=                 

5((√2a)²-(√7)²)         5(√2a-√7)(√2a+√7)      5(√2a+√7) ( √2a-√7)

      2

=_________

-5(√2a+√7