Question

O Add.

(iii) 13x2 - 12y2; 6x2 - 8y2
Xu 3,2
10​

Answer 1

Answer:

${13x}^{2} - {12y}^{2} + {6x}^{2} - {8y}^{2} \\ = ( {13x}^{2} + {6x}^{2} ) + ( { - 12y}^{2} - {8y}^{2} ) \\ = {19x}^{2} - {20y}^{2}$

Answer 2

Answer:

$19x {}^{2} - 20y {}^{2}$