Question

if A = 7x² + 5xy - 9y?, B + - 4x² + xy + 5y and C = 4y2 – 3x® - 6xy then show that
A + B + C=0,​

Answer 1

Answer:

hope help u

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Answer 2

Answer:

-3$x^{2}$+3$x^{2}$+$4y2$

Step-by-step explanation:

(7$x^{2}$+5$xy$-9$y$) + (-4$x^{2}$+$xy$+5$y$) + (-3$x^{r}-6x+4y2$)