Question

Q. Simplify the following expressions by adding or subtracting like terms.

1. 5ax - 3ay + 2ay
2. $5a^2-7b^2-10a^2+4b^2$
3. $3x^2+5y^2-5xy+4x^2$

Answer 1

$$\begin{gathered} \left(1\right). \\ 5\mathrm{ax}-3\mathrm{ay}+2\mathrm{ay} \\ =5\mathrm{ax}-\mathrm{ay} \\ \left(2\right). \\ 5{\mathrm{a}}^2-7{\mathrm{b}}^2-10{\mathrm{a}}^2+4{\mathrm{b}}^2 \\ =-5{\mathrm{a}}^2-3{\mathrm{b}}^2 \\ \left(3\right). \\ 3{\mathrm{x}}^2+5{\mathrm{y}}^2-5\mathrm{xy}+4{\mathrm{x}}^2 \\ =7{\mathrm{x}}^2+5{\mathrm{y}}^2-5\mathrm{xy} \end{gathered}$$