$|\overset{\rightarrow}{a}=5|, |\overset{\rightarrow}{b}|=6, \overset{\rightarrow}{a}.\overset{\rightarrow}{b}=-25$ ആയാൽ $|\overset{\rightarrow}{a} \times \overset{\rightarrow}{b}|=$

$\overset{\rightarrow}{a}=\beta i+2j +2k , \overset{\rightarrow}{b} = 2i + 2j + \beta k$ എന്നീ സദിശങ്ങൾ ലംബങ്ങളായാൽ $|\overset{\rightarrow}{a}+\overset{\rightarrow}{b}|-|\overset{\rightarrow}{a}-\overset{\rightarrow}{b}|=$

$\overset{\rightarrow}{a}$ ഒരു ഏകക സദിശമാണ് , $(\overset{\rightarrow}{x} - \overset{\rightarrow}{a}).(\overset{\rightarrow}{x}+\overset{\rightarrow}{a})=12$ ആയാൽ $\overset{\rightarrow}{x}$ ന്ടെ വലിപ്പം എത്ര?

$(\overset{\rightarrow}{x} - \overset{\rightarrow}{a}).(\overset{\rightarrow}{x}+\overset{\rightarrow}{a})=12$