Question

can anyone explain me this 2 questions ??

Answer 1

10x^2-6xy-2y^2 ...........^2means square

Answer 2

${6x}^{2} + 8xy - {8y}^{2} + {4x}^{2} - 14xy$
$+ {6y}^{2}$

1 step > >
${6x }^{2} + {4x}^{2} + {6y}^{2} - {8y}^{2} - 14xy$