GRADE 9 MATHEMATICS Activity 1 TERM 2 INVESTIGATION Copy and Complete the following table. Classify the expressions as monomial, binomial, trinomial and polynomial. Expressions a. 3(x+y) b. 1000 C. 7+y+5x d. pq xr-T == 2 e. ab x 2 + bc x 4 3+ cd+da x 1 Number of terms Type of expressions monomial P monomial Polonomial APRIL 2024 Activity 2 Consider the algebraic expressions below and answer the questions that follow. {10} 4x-2y+3 a. What will be the expressions if the above expressions is doubled b. How many terms will the doubled expression have? [3] [1] c. What is the constant term of the doubled expression? [1] d. Write the coefficient of x of the doubled expression. [1] e. Write the coefficient of y of the doubled expression [1] f. What is the degree of the original expression? [1] g. What is the degree of the doubled expression? [1] h. Are the degrees of the original and doubled expression similar or different? Explain your answers. [2] {11} Activity 3 An original 2 dimension rectangular shape with the following dimensions: Length - twice a number (x) increased by 3 cm width - a number(x) increased by 4 cm The enlarged dimensions of the rectangle are as follows: ength - 6 times a number(x) is increased by 9 cm Width - 3 times a number(x) increased by 12 cm a. Draw and label an original 2 dimension rectangle b. Draw and label an enlarged 2 dimension rectangle c. With how much were the dimensions enlarged? [1] GRADE 9 MATHEMATICS Original rectangle Enlarged rectangle TERM 2 INVESTIGATION Total of original and enlarged d. Activity 4 Area Perimeter APRIL 2024 [12] {17) Grade 9 learners were given some algebraic expressions to factorise fully. Some learners factorised correctly while some made mistakes. Copy and complete the table following the instructions below. ➤ Identify and circle the letter that represent solutions with correct answers. From the incorrect solutions, identify by underlining the mistakes made in each. > Correct the mistakes made in each incorrect solutions. Algebraic expressions e.g. 9x3+12x2+3x a. 10x²+25x3 b. 3ab-6a c. a²-4b2 d. 27x2-3y² e. 7x+14y Possible solutions x(9x2-12x+3) 5x(2+25x2) 3a(b-2) (a+4b)(a-4b) 3(9x2-y²) 3(3x+y)(3x-y) 7(x+2y) TOTAL Corrected solution 3x(3x²-4x+1) [12] (50
