Question

(b) -2xy + 3, 7xy - 5, 3xy + 8, -xy - 1 ​

Answer 1

Answer:

$</strong></p><p><strong>[tex] \mathfrak \red{=3xy+7}</strong></p><p></p><p><strong>[tex] \mathfrak \red{=3xy+7}$

$\small(−2x)(y)+(3)(7)xy−(5)(3)xy+8−xy−1 \\ </p><p></p><p>$

$</p><p>=−2xy+21xy+−15xy+8+−xy+−1</p><p></p><p>$

$</p><p>=−2xy+21xy+−15xy+8+−xy+−1 \\ </p><p></p><p>$

$</p><p></p><p>=(−2xy+21xy+−15xy+−xy)+(8+−1)</p><p></p><p></p><p></p><p></p><p></p><p>$

$</p><p> \fbox \red{=3xy+7}</p><p></p><p>$