Question

Exerrcitiul 2 va rog frumos

Answer 1

Răspuns:

a) 2√3-√8 / √7+1

2√3-2√2/ √7+1

2(√3-√2) / √7+1 ×√7-1 / √7-1 = 2√21-2√3-2√14+2√2 / √7^2-1

2(√21-√3-√14+√2) / 7-1

2(√21-√3-√14+√2) / 6

√21-√3-√14+√2 / 3

b) 2√7+2 / √3-√2

2(√7+1) / √3-√2 × √3+√2 / √3+√2 = 2√21-2√3-2√14+2√2 / √3^2-√3^2

2(√21-√3-√14+√2) / √3^2-√3^2

2(√21-√3-√14+√2) / 3-√2^2

2(√21-√3-√14+√2) / 3-2

2(√21-√3-√14+√2) / 1

Simplificam : 2(√21-√3-√14+√2)