Question

Subtract 5x2 – 4y2 + 6y – 3 from 7x2 – 4xy + 8y2 + 5x – 3y

Answer 1

Answer:

Step-by-step explanation:

(7x²-4xy+ 8y²+5x-3y) - (5x²+4y²+6y-3)

= 7x²-5x²-4xy+ 8y²- 4y²+5x-3y-6y+3

=2x²-4xy+ 4y²- 5x-9y+3

=2x²+4y²-4xy- 5x -9y+ 3

Answer 2

$= 7x {}^{2} - 4xy + 8y {}^{2} + 5x - 3y \\ = 5x {}^{2} \: - 4y {}^{2} \: \: \: + 6y - 3 \\ \\ = ( - ) \: \: \: ( + ) \: \: \: ( - ) \: \: \: ( + ) \\ \\ \\ = 2x {}^{2} - 4xy + 12 {}^{2} + 5x - 9y \: + 3$