Question

Sub 5x^2-4y^2+6y-3 from 7x^2-4xy+8y+5x+3y

Answer 1

$(7 - 5) {x}^{2} - 4 {y}^{2} - 4xy + (11 - 6)y + 5x + 3$
$2 {x}^{2} - 4 {y}^{2} - 4xy + 5y + 5x + 3$

Answer 2

$<b>$Hello

$(7x ^{2} - 4xy + 8y +5x + 3y) - (5x {}^{2} - 4y {}^{2} + 6y - 3 )\\= 2x {}^{2} - 4xy + 5y + 5x + 4y {}^{2} + 3$

Refer to the attachment