Author name: Eduaid

Exercise 4.1 Question 1: Check whether the following are quadratic equations: (i) ((x_1)^2=2(x-3)) (ii) (x^2-2x=(-2)(3-x)) (iii) ((x-2)(x+1)=(x-1)(x+3)) (iv) ((x-3)(2x+1)=x(x+5)) (v) ((2x-1)(x-3)=(x+5)(x-1)) (vi) (x^2+3x+1=(x-2)^2) (vii) ((x+2)^3=2x(x^2-1)) (viii) (x^34x^2-x+1=(x-2)^2) Answer:  (i) ((x+1)^2=2(x-3)) (⇒x^2+2x+1=2x-6) (⇒x^2+7=0) It is of the form (ax^2+bx+c=0) Hence, the given equation is a quadratic equation. (ii) (x^2-2x(-2)(3-x)) (⇒x^2-2x=-6+2x) (⇒x^2-4x+6=0) It is of the form […]

Exercise 3.1 Question 1: Aftab tells his daughter, “Seven years ago, I was seven times as old as you were then. Also, three years from now, I shall be three times as old as you will be.” (Isn’t this interesting?) Represent this situation algebraically and graphically. Answer: Let the present age of Aftab be (x).

Exercise 2.1 Question 1: The graphs of (y = p(x)) are given in following figure, for some polynomials (p(x)). Find the number of zeroes of (p(x)), in each case. (i)   Answer:  (i) The number of zeroes is (0) as the graph does not cut the (x)-axis at any point. (ii) The number of zeroes

Exercise 1.1 Question 1: Use Euclid’s division algorithm to find the (HCF) of: (i) (135) and (225)                                   (ii) (196) and (38220)                        (iii) (867) and (225) Answer: (i) (135) and (225) Since (225 > 135), we apply the division lemma to (225) and (135)  to obtain (225 = 135times 1 + 90) Since remainder (90 ≠

NCERT Solutions for class-16 Science chapter 16 “Management of  Natural  Resources” is curated by senior and experienced teachers of EduAid. Before answering the questions of Chapter 16 , read the theory of the chapter multiple times and get a clear understanding of the concepts included in the chapter. Here are the answers of the questions included in the

NCERT Solutions for class-16 Science chapter 16 “Management of  Natural  Resources” is curated by senior and experienced teachers of EduAid. Before answering the questions of Chapter 16 , read the theory of the chapter multiple times and get a clear understanding of the concepts included in the chapter. Here are the answers of the questions included in the

NCERT Solutions for class-10 Science chapter 15 “Our Environment” is curated by senior and experienced teachers of EduAid. Before answering the questions of Chapter 15 , read the theory of the chapter multiple times and get a clear understanding of the concepts included in the chapter. Here are the answers of the questions included in the NCERT book.

NCERT Solutions for class-10 Science chapter 14 “Sources of Energy” is curated by senior and experienced teachers of EduAid. Before answering the questions of Chapter 14 , read the theory of the chapter multiple times and get a clear understanding of the concepts included in the chapter. Here are the answers of the questions included in the NCERT