Amazing Mathematics (2020)

1. Simplify the algebraic expressions below.
   (a) $3x+2x$
   (b) $2x-6x$
   (c) $-x+3x$
   ≤(d) $-2x-4x$
2. Find the sum of two or more of the algebraic expressions below.
   (a) $2y+4,5y-1$
   (b) $-4y-x,3y+x$
   (c) $x-3y-1,-y-3,2x+5$

Solutions

1. (a) $3x+2x$

$$\begin{array}{r}3x+2x\\ 5x\end{array}$$

1. (b) $2x-6x$

$$\begin{array}{r}2x-6x\\ -4x\end{array}$$

2. $4x^2-16x$ $$\begin{array}{r}4x^2-16x\\ 4x(x-4)\end{array}$$