Question

2*radical 162 + radical 21 *(-radical 42) +3radical98 :radical 49 Care este rezultatul ?? Repede va rog   si descompunerea la radicali va rog nu doar raspunsul

Answer 1

2√162=2√(2x3⁴)=2x3²√2=18√2
3√98=3√(2x7²)=3x7√2=21√2
√49=√7²=7
=18√2-√(21x42)+21√2:7=
=18√2-√(3²x7²x2)+3√2=
=21√2-21√2=0

Answer 2

2√162=2√(2x3⁴)=2x3²√2=18√2
3√98=3√(2x7²)=3x7√2=21√2
√49=√7²=7
=18√2-√(21x42)+21√2:7=
=18√2-√(3²x7²x2)+3√2=
=21√2-21√2=0