a)-3radical7=√(-3)²×7 = √9×7 = √63
b)-10radical5=√(-10)²×5 = √100×5 = √500
a=2supra3radical3+radical3 supra 3
Rationallizam cu √3 prima fractie 2√3/3×3 = 2√3/9
a = 2√3/9 + √3/3
a = 2√3/9 + 3√3/9 = 5√3/9
b=4 supra radical3-2radical3 supra 3
Rationallizam cu √3 prima fractie 4√3/3 = 4√3/3
b = 4√3/3 - 2√3/3 = 2√3/3
