Question

2√50-3√128+4√72-5√162+6√98=

Answer 1

Răspuns:

Explicație pas cu pas:

2√50 -  3√128 + 4√72 - 5√162 + 6√98 =

2√(25×2) - 3√(64×2) + 4√(36×2) -  5√(81×2) + 6√(49×2) =

2×5√2 - 3×8√2 + 4×6√2 - 5×9√2 + 6×7√2 =

10√2 - 24√2 + 24√2 - 45√2 + 42√2 =

7√2