3.5 β Collect Like Terms MPM1D Jensen 1. Which polynomial contains no like terms?
A) 2π₯ + 5β 3π₯ + 2π₯π¦ B) 3π₯! + 3π₯π¦ + 3 C) 4β 9π₯ + 9π¦ + 3 D) β4π! + 5π β 2π! + 7π
2. Classify each pair of terms as either like or unlike. a) 2π₯ πππ β 5π₯ b) 3π¦ πππ 3π§ c) βπ₯! πππ !
!π₯!
d) 4π! πππ 3π! e) 2ππ πππ 3π! f) 5π₯!π¦ πππ β 2π₯π¦! g) 3π’π£ πππ 2π£π’ h) 9π!π! πππ β 4π!π! 3. Simplify where possible a) 3π₯ + 6π₯ b) 2π + 5π c) 5β + 8β + 2β d) 7π’ + 4π’ + π’ 4. Simplify if possible a) 4π β 2π b) 8π β π c) 3π§ β 7π§ d) π β 6
5. Simplify by collecting like terms. a) 3π₯ + 5+ 2π₯ + 1 b) 2π + 3π + 4π + 6π c) 8π + 5β 3π β 2 6. Simplify a) 3π₯ β 8β 4+ 3 b) 2π₯! + 7π₯ + 4π₯! + π₯ c) 7π + 6π! β 2π +π! d) 3π β 5+ 8β π + 1β 4π e) β3π’ + 2β π’! β 5+ 3π’ + 2π’! β 3 7. Simplify a) 2π! β 3ππ β 6+ 4π! + 7+ 5ππ β 3π β 2π! b) 3ππ + 6π! β π! + 3βπ! β 3ππ + 2π! β 4
8. The length of a rectangular field is three times its width. a) Write an expression for the perimeter of the field. b) Find the perimeter if the field is 300 m wide. c) Find the length and width of the field if the perimeter is 1600 m. 9 (extension). a) An equilateral triangle has an unknown side length, π₯. Write a simplified expression for its perimeter. b) A right isosceles triangle has two sides equal to π₯. Which triangle, the equilateral triangle in part a) or the right isosceles triangle, has the greater perimeter? Use algebraic reasoning.
Answers
1) B 2) a) like b) unlike c) like d) unlike e) unlike f) unlike g) like h) like 3) a) 9π₯ b) canβt simplify c) 15β d) 12π’ 4) a) 2π b) 7π c) β4π§ d) canβt simplify 5) a) 5π₯ + 6 b) 8π + 7π c) 5π + 3 6) a) 3π₯ β 9 b) 6π₯! + 8π₯ c) 7π! + 5π d) β2π + 4 e) π’! β 6 7) a) 4π! + 2ππ β 3π + 1 b) 7π! + π! β 1 8) a) π = 8π€ b) 2400 m c) l=600m and w=200m 9) a) π = 3π₯ b) Isosceles is greater because 3.4π₯ > 3π₯