Упростите √52-√28+2√7-√13

Question

Упростите √52-√28+2√7-√13

Answer 1

√52 - √28 + 2√7 - √13 = √(4×13) - √(4×7) + 2√7 - √13 = 2√13 - 2√7 + 2√7 - √13 = √13

Answer 2

=2√13-2√7+2√7-√13=2√13-√13=√13(2-1)=√13