Question

all maths formulas of class 8 for solving calculation

Answer 1

(a+b)^2= a^2+2ab+b^2

(a-b)^2=a^2-2ab+b^2

(a+b)(a-b)=a^2-b^2

(x+a)(x+b)=x^2+(a+b)x+ab

(x-a)(x-b)=x^2–(a+b)x+ab

(x–a)(x+b)=x^2+(b–a)x–ab

(x+a)(x–b)=x^2   +(a–b)x–ab

(a+b)^3=a^3+b^3        +3ab(a+b)

(a–b)^3=a^3-b^3        –3ab(a–b)