Question

sa se calculeze folosind metoda factorului comun 49×16-41×45+25×49

Answer 1

49×16-41×45+25×49 =
= 49×(16+25) - 41 ×45 =
= 49 × 41 - 41 × 45 =
= 41 × (49 -45) =
= 41 × 4 =
= 164

Answer 2

$49\times16-41\times45+25\times49 = \\ \\ =49\times(16+25)-41\times 45 = \\ \\ = 49\times41-41\times 45 = \\ \\ = 41\times (49-45) = \\ \\ = 41\times 4 = \\ \\ = 164$