Chapter 9 – Algebraic Expressions and Identities
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109. If a + b = 25 and a^2 + b^2 = 225, then find ab.
27
Jul
109. If a + b = 25 and a^2 + b^2 = 225, then find ab. 109. If a + b = 25 and a^2 + b^2 = 225 then find ab. July 27, 2021 Category: Chapter 14 - Factorisation , Chapter 9 - Algebraic Expressions and Identities , Maths , NCERT Class 8 ,
108. If p + q = 12 and pq = 22, then find p^2 + q^2.
27
Jul
108. If p + q = 12 and pq = 22, then find p^2 + q^2. 108. If p + q = 12 and pq = 22 then find p^2 + q^2. July 27, 2021 Category: Chapter 14 - Factorisation , Chapter 9 - Algebraic Expressions and Identities , Maths , NCERT Class 8 ,
107. The radius of a circle is 7ab – 7bc – 14ac. Find the circumference of the circle.
27
Jul
107. The radius of a circle is 7ab – 7bc – 14ac. Find the circumference of the circle. 107. The radius of a circle is 7ab – 7bc – 14ac. Find the circumference of the circle. July 27, 2021 Category: Chapter 14 - Factorisation , Chapter 9 - Algebraic Expressions and Identities , Maths , [...]
106. The base of a parallelogram is (2x + 3 units) and the corresponding height is (2x – 3 units). Find the area of the parallelogram in terms of x. What will be the area of parallelogram of x = 30 units?
27
Jul
106. The base of a parallelogram is (2x + 3 units) and the corresponding height is (2x – 3 units). Find the area of the parallelogram in terms of x. What will be the area of parallelogram of x = 30 units? 95. Perform the following divisions: (i) (3pqr – 6p^2q^2r^2) ÷ 3pq July 27, [...]
105. The cost of a chocolate is Rs (x + y) and Rohit bought (x + y) chocolates. Find the total amount paid by him in terms of x. If x = 10, find the amount paid by him.
27
Jul
105. The cost of a chocolate is Rs (x + y) and Rohit bought (x + y) chocolates. Find the total amount paid by him in terms of x. If x = 10, find the amount paid by him. 105. The cost of a chocolate is Rs (x + y) and Rohit bought (x + [...]
104. The height of a triangle is x^4 + y^4 and its base is 14xy. Find the area of the triangle.
27
Jul
104. The height of a triangle is x^4 + y^4 and its base is 14xy. Find the area of the triangle. 104. The height of a triangle is x^4 + y^4 and its base is 14xy. Find the area of the triangle. July 27, 2021 Category: Chapter 14 - Factorisation , Chapter 9 - Algebraic [...]
103. The sum of (x + 5) observations is x^4 – 625. Find the mean of the observations.
27
Jul
103. The sum of (x + 5) observations is x^4 – 625. Find the mean of the observations. 103. The sum of (x + 5) observations is x^4 – 625. Find the mean of the observations. July 27, 2021 Category: Chapter 14 - Factorisation , Chapter 9 - Algebraic Expressions and Identities , Maths , [...]
102. The sum of first n natural numbers is given by the expression n^2/2 + n/2 . Factorise this expression.
27
Jul
102. The sum of first n natural numbers is given by the expression n^2/2 + n/2 . Factorise this expression. 102. The sum of first n natural numbers is given by the expression n^2/2 + n/2 . Factorise this expression. July 27, 2021 Category: Chapter 14 - Factorisation , Chapter 9 - Algebraic Expressions and [...]
101. The area of a circle is given by the expression πx^2 + 6πx + 9π. Find the radius of the circle.
27
Jul
101. The area of a circle is given by the expression πx^2 + 6πx + 9π. Find the radius of the circle. 101. The area of a circle is given by the expression πx^2 + 6πx + 9π. Find the radius of the circle. July 27, 2021 Category: Chapter 14 - Factorisation , Chapter 9 [...]
100. The curved surface area of a cylinder is 2π (y^2 – 7y + 12) and its radius is (y – 3). Find the height of the cylinder (C.S.A. of cylinder = 2πrh).
27
Jul
100. The curved surface area of a cylinder is 2π (y^2 – 7y + 12) and its radius is (y – 3). Find the height of the cylinder (C.S.A. of cylinder = 2πrh). 100. The curved surface area of a cylinder is 2π (y^2 – 7y + 12) and its radius is (y – 3). [...]