exercise 2.4 🤯🤯| chapter 2 | polynomials 🔥| class 9 | part 1 #ncert #maths #infinixclasses

exercise 2.4 🤯🤯| chapter 2 | polynomials 🔥| class 9 | part 1 #ncert #maths #infinixclasses

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1. Use suitable identities to find the following products:
(i) (x + 4) (x + 10)

(ii) (x + 8) (x – 10)

(iii) (3x + 4) (3x – 5)

(iv) (y2 + 3/2 ) (y2 – 3/2)

(v) (3 – 2x) (3 + 2x)

2. Evaluate the following products without multiplying directly:
(i) 103 × 107

(ii) 95 × 96

(iii) 104 × 96
3. Factorise the following using appropriate identities:
(i) 9x2 + 6xy + y2

(ii) 4y2 – 4y + 1

(iii) x2 – y2/100
4. Expand each of the following, using suitable identities:

(i) (x + 2y + 4z)2

(ii) (2x – y + z)2

(iii) (–2x + 3y + 2z)2

(iv) (3a – 7b – c)2

(v) (–2x + 5y – 3z)2

(vi) [𝟏/𝟒 𝒂 − 𝟏/𝟐 𝒃+𝟏]^𝟐

5. Factorise:
(i) 4x2 + 9y2 + 16z2 + 12xy – 24yz – 16xz

(ii) 2x2 + y2 + 8z2 – 2√2 xy + 4√2 yz – 8xz

6. Write the following cubes in expanded form:
(i) (2x + 1)3

(ii) (2a – 3b)3

(iii) [𝟑/𝟐 𝒙+𝟏]^𝟑

(iv) [𝒙 − 𝟐/𝟑 𝒚]^𝟑
7. Evaluate the following using suitable identities:
(i) (99)3

(ii) (102)3

(iii) (998)3

8. Factorise each of the following:
(i) 8a3 + b3 + 12a2b + 6ab2

Видео exercise 2.4 🤯🤯| chapter 2 | polynomials 🔥| class 9 | part 1 #ncert #maths #infinixclasses канала Infinix Classes