Question

What is the difference of the polynomials?

Answer 1

Answer:

O 7x2 + 3y2 - 4x

.........

Answer 2

$\qquad \qquad\huge \underline{\boxed{\sf ᴀɴsweʀ}}$

The Correct choice is ~ A

$\qquad \sf \dashrightarrow \: 7 {x}^{2} + 3 {y}^{2} - 4x$

$\large \boxed{ \mathrm{Step\:\: By\:\:Step\:\:Explanation}}$

$\sf \dashrightarrow \:(12 {x}^{2} - 11y { }^{2} - 13x) - (5 {x}^{2} - 14y { }^{2} - 9x)$

$\sf \dashrightarrow \:12 {x}^{2} - 11y { }^{2} - 13x- 5 {x}^{2} + 14y { }^{2} + 9x$

$\sf \dashrightarrow \: 12 {x}^{2} - 5 {x}^{2} - 11y { }^{2} + 14 {y}^{2} - 13x + 9$

$\sf \dashrightarrow \: 7 {x}^{2} + 3 {y}^{2} - 4x$