3/2 + 6/2 - 9/2= 9/2 - 9/2= 0
/ e radical
Răspuns:
Explicație pas cu pas:
√18 + √72 - √162 = 0
= √(9×2) + √(36×2) - √(81×2) =
= 3√2 + 6√2 - 9√2 =
= 9√2 - 9√2 =
= 0
______________________
√18 = √(3²×2) = 3√2
√72 = √36 ×√2 = √(6²)×√2 = 6√2
√162 = √(81) ×√2 = √(9²) ×√2 = 9√2
