Class 9 Math Exercise 4.2 Complete || 9 Class Mathematics Exercise 4.2 Question No.1 To 15

Class 9 Math Exercise 4.2 Complete || 9 Class Mathematics Exercise 4.2 Question No.1 To 15

Class 9 Math Exercise 4.2 Question No.1
Class 9 Math Exercise 4.2 Question No.2
Class 9 Math Exercise 4.2 Question No.3
Class 9 Math Exercise 4.2 Question No.4
Class 9 Math Exercise 4.2 Question No.5
Class 9 Math Exercise 4.2 Question No.6
Class 9 Math Exercise 4.2 Question No.7
Class 9 Math Exercise 4.2 Question No.8
Class 9 Math Exercise 4.2 Question No.9
Class 9 Math Exercise 4.2 Question No.10
Class 9 Math Exercise 4.2 Question No.11
Class 9 Math Exercise 4.2 Question No.12
Class 9 Math Exercise 4.2 Question No.13
Class 9 Math Exercise 4.2 Question No.14
Class 9 Math Exercise 4.2 Question No.15

Title: "All Algebraic Formulas | 9th Class Math | Ex.4.2 Q1-15 | Punjab, KPK, and Federal Board"

Intro: "Welcome to Math Expert! In this comprehensive video, we'll cover all the essential Algebraic Formulas, including identities, factorization, and expansions, solving examples from Exercise 4.2, Question 1-15, covering all boards of Punjab, KPK, and Federal Board. Get ready to master Algebra!"

Description:

_Algebraic Formulas_

1. (a²+b²)²+(a²-b²)²=2(a²+b²)
2. (a²+b²)²-(a²-b²)²=4ab
3. x³+y³=(x+y)(x²-xy+y²)
4. x³-y³=(x-y)(x²+xy+y²)
5. (x+y)³=x³+3x²y+3xy²+y³
6. (x-y)³=x³-3x²y+3xy²-y³
7. (a+b+c)²=a²+b²+c²+2ab+2bc+2ca

_Examples_

1. Expand: (x+2)³
2. Factorize: x³+8
3. Simplify: (a+b+c)²-2(ab+bc+ca)
4. Solve: x³-2x²-5x+6=0
5. Find: (2x+3)³-(2x-3)³
6. Prove: (a+b)²=(a-b)²+4ab
7. Simplify: (x+y+z)²-2(xy+yz+zx)

_Solutions_

1. (x+2)³=x³+6x²+12x+8
2. x³+8=(x+2)(x²-2x+4)
3. (a+b+c)²-2(ab+bc+ca)=a²+b²+c²-2(ab+bc+ca)
4. x³-2x²-5x+6=(x-1)(x-2)(x+3)=0
5. (2x+3)³-(2x-3)³=108x
6. (a+b)²=(a-b)²+4ab
7. (x+y+z)²-2(xy+yz+zx)=x²+y²+z²

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