Students can Download Maths Chapter 3 Algebra Ex 3.2 Questions and Answers, Notes Pdf, Samacheer Kalvi 8th Maths Book Solutions Guide Pdf helps you to revise the complete Tamilnadu State Board New Syllabus and score more marks in your examinations.

## Tamilnadu Samacheer Kalvi 8th Maths Solutions Term 1 Chapter 3 Algebra Ex 3.2

Question 1.

Fill in the blanks:

Solution:

(i) \(\frac{18 m^{4}\left(n^{8}\right)}{2 m^{(3)} n^{3}}\) = 9 mn^{5}

(ii) \(\frac{l^{4} m^{5} n^{(7)}}{2 l m^{(3)} n^{6}}=\frac{l^{3} m^{2} n}{2}\)

(iii) \(\frac{42 a^{4} b^{5}\left(c^{2}\right)}{6(a)^{4}(b)^{2}}\) = (7)b^{3}c^{2}

Question 2.

Say True or False:

(i) 5x^{3}y ÷ 4x^{2} = 2xy

(ii) 7ab^{2} ÷ 14ab = 2b^{2}

Solution:

(i) True

(ii) False

Question 3.

(i) 27y^{3} ÷ 3y

(ii) x^{3}y^{2} ÷ x^{2}y

(iii) 45x^{3}y^{2}z^{4} ÷ (-15xyz)

(iv) (3xy)^{2} ÷ 9xy

Solution:

Question 4.

Solution:

Question 5.

Divide

(i) 32y^{2} – 8yz by 2y

(ii) (4m^{2} n^{3} + 16m^{4} n^{2} – mn) by 2 mn

(iii) 10 (4x – 8y) by 5 (x – 2y)

(iv) 81 (9^{4}q^{2}r^{3} + 2p^{3}q^{3}r^{2} – 5p^{2}q^{2}r^{2}) by (3pqr)^{2}

Solution:

Question 6.

Find Adirai’s percentage of marks who scored 25m^{3}n^{2}p out of 100m^{2}np

Solution:

Total marks = 100 m^{2}np

Adirai’s score = 25 m^{3}n^{2}p

Question 7.

Identify the error and correct them.

(i) 7y^{2} – y^{2} + 3y^{2} = 10y^{2}

(ii) 6xy + 3xy = 9x^{2}y^{2}

(iii) m (4m – 3) = 4m^{2} – 3

(iv) (4n)^{2} – 2n + 3 = 4n^{2} – 2n + 3

(v) (x – 2) (x + 3) = x^{2} – 6

Solution:

(i) 7y^{2} – y^{2} + 3y^{2} = (7 – 1 + 3)y^{2} = (6 + 3)y^{2} = 9y^{2}

(ii) 6xy + 3xy = (6 + 3)xy = 9xy

(iii) m (4m – 3) = m (4m) + m (-3) = 4m^{2} – 3m

(iv) (4n)^{2} – 2n + 3 = 16n^{2} – 2n + 3

(v) (x – 2) (x + 3) = x (x + 3) – 2 (x + 3) = x (x) + (x) × 3 + (-2) (x) + (-2) (3)

= x^{2} + 3x – 2x – 6 = x^{2} + x – 6