Unit 4. Day 6.

Commercial Break #1 2 2𝑥 ∙ 𝑥 3𝑥 4 3 4 3 4 𝑥 3 4𝑥 1 ∙ 𝑥 1 7 1 1 1 7 𝑥 𝑥 7 𝑥 7 ∙ 𝑥

Commercial Break #1 5𝑛 6 5 6 𝑛 − 7𝑚 8 − 7 8 𝑚 1𝑎 2 1 2 𝑎 𝑎 2

Example A: Rewrite the expressions by collecting like terms 2 3 𝑥 2 3 𝑥− 3 4 𝑦+4𝑥− 𝑦 5 + 5𝑥 6 − 3 4 𝑦 + 5𝑥 6 − 𝑦 5 + 4𝑥 11 2 𝑥 − 19 20 𝑦 2 3 𝑥 + 4 1 𝑥 + 5 6 𝑥 − 3 4 𝑦 − 1 5 𝑦 15 6 𝑥 + 6 𝑥 + 6 𝑥 4 24 5 33 11 2 𝑥 − 20 𝑦− 20 𝑦 4 − 19 20 𝑦 = 6 𝑥 = =

Example B*: Rewrite the expressions by collecting like terms 5 8 − 𝑛 6 +3𝑛−1 3 4 − 3 2 𝑛 5 8 − 1 3 4 − 𝑛 6 − 3 2 𝑛 + 3𝑛 − 9 8 − 9 8 4 3 𝑛 4 3 𝑛 + + 5 8 − 7 4 − 1 6 𝑛 + 3 1 𝑛 − 3 2 𝑛 8 8 − 8 5 14 − 6 𝑛 + 6 𝑛 − 6 𝑛 1 18 6 𝑛 −9 9 = 8 =

Commercial Break #2 2𝑥 3 2𝑥+5 3 5 3 + 8 11 − 5𝑦 11 8−5𝑦 11

Commercial Break #2 8𝑥 − 6 8𝑥−6 12 8𝑥 12 −6 12 12 12 8 12 𝑥 − 6 12 2 3 𝑥 − 1 2

Example C: Rewrite the following expression in standard form 2 3𝑥−4 6 − 5𝑥+2 8 4 6 − 5𝑥+2 8 6𝑥 − 8 3 4 3 24𝑥−32 24𝑥 −32 15𝑥+6 15𝑥 + 6 24 − 24 − 24 −15𝑥 −6 9𝑥 −38 9𝑥 24 38 24 3 8 𝑥 − 19 12 24𝑥 −32 24 = 24 = − =

Example D*: Rewrite the following expression in standard form 2 5𝑔−1 4 − 2𝑔+3 6 3 2 4 − 2𝑔+3 6 10𝑔 − 2 3 2 30𝑔−6 30𝑔 −6 4𝑔+6 4𝑔 + 6 12 − 12 − 12 −4𝑔 −6 26𝑔 −12 26𝑔 12 −6 12 12 13 6 𝑔 30𝑔 = 12 = − 12 = −1