Question

What should be added to 4xsquare – 5xy +9
to get -2xsquare + 3xy - 5?​

Answer 1

Answer:

$6x^{2} -8xy+14$ should be added.

Step-by-step explanation:

We subtract the second equation from the first one to get what must be added. The signs of the second equation would change:

$\left[\begin{array}{ccc}4x^{2} -&5xy+&9\\2x^{2}- &3xy+&5\\=6x^{2}-&8xy+&14\end{array}\right]$

Hence, the answer.