Question

1
26. If we add, 7xy + 5yz - 3zx,
4yz + 9zx - 4y and -3x2 + 5x -
2xy, then the answer is:
O A. 5xy + 9y2 +3zx + 5x - 4y
O B. 5xy - 9yz +3zx - 5x - 4y
O C. 5xy + 10yz +3zx + 15x - 4y
O D. 5xy + 10yz +3zx + 5x - 6y​

Answer 1

Answer:

answer is A

Step-by-step explanation:

Answer:

\begin{gathered} \\ Add \: 7xy + 5yz - 3zx , 4yz + 9zx - 4y and - 3xz + 5x - 2xy . \\ < /p > < p > < /p > < p > \\ 7x + 5yz - 3zx + (4yz + 9zx - 4y) + (- 3xz + 5x - 2xy) \\ < /p > < p > < /p > < p > \\ 7xy + 5yz - 3zx + 4yz + 9zx - 4y - 3xz + 5x - 2xy \\ < /p > < p > < /p > < p > \\ By rearranging :- < /p > < p > \\ < /p > < p > 7xy - 2xy + 5yz + 4yz - 3zx + 9zx - 3xz - 4y + 5x \\ < /p > < p > < /p > < p > \\ 5xy + 9yz + 3zx - 4y + 5x\end{gathered}

Add7xy+5yz−3zx,4yz+9zx−4yand−3xz+5x−2xy.

</p><p></p><p>

7x+5yz−3zx+(4yz+9zx−4y)+(−3xz+5x−2xy)

</p><p></p><p>

7xy+5yz−3zx+4yz+9zx−4y−3xz+5x−2xy

</p><p></p><p>

Byrearranging:−</p><p>

</p><p>7xy−2xy+5yz+4yz−3zx+9zx−3xz−4y+5x

</p><p></p><p>

5xy+9yz+3zx−4y+5x