Recent questions tagged marks3

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Factorise the expressions and divide them as directed: `(3x^4 – 1875) -: (3x^2 –

asked Jan 17, 2022 in 8th-maths by Simran (1.8k points)

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The area of a square is given by `4x^2 + 12xy + 9y^2`. Find the side of the

asked Jan 17, 2022 in 8th-maths by sumit (1.6k points)

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The area of a square is `9x^2 + 24xy + 16y^2`. Find the side of the

asked Jan 17, 2022 in 8th-maths by Simran (1.8k points)

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The area of a rectangle is `x2 + 7x + 12`. If its breadth is (x + 3), then find its

asked Jan 17, 2022 in 8th-maths by yogita (1.8k points)

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The curved surface area of a cylinder is `2pi (y^2 – 7y + 12)` and its radius is (y – 3). Find the height of the cylinder (C.S.A. of cylinder

asked Jan 17, 2022 in 8th-maths by vaibhav (1.7k points)

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The area of a circle is given by the expression `πx^2 + 6πx + 9π`. Find the radius of the

asked Jan 17, 2022 in 8th-maths by Simran (1.8k points)

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The sum of first n natural numbers is given by the expression `n^2/2+n/2`. Factorise this

asked Jan 17, 2022 in 8th-maths by nikhil (1.8k points)

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The sum of (x + 5) observations is `x^4 – 625`. Find the mean of the

asked Jan 17, 2022 in 8th-maths by yogita (1.8k points)

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The height of a triangle is `x^4 + y^4` and its base is 14xy. Find the area of the

asked Jan 17, 2022 in 8th-maths by vaibhav (1.7k points)

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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

asked Jan 17, 2022 in 8th-maths by Arun (1.7k points)

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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

asked Jan 17, 2022 in 8th-maths by yogita (1.8k points)

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The radius of a circle is 7ab – 7bc – 14ac. Find the circumference of the circle.

asked Jan 17, 2022 in 8th-maths by purvi (1.8k points)

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If p + q = 12 and pq = 22, then find `p^2 +

asked Jan 17, 2022 in 8th-maths by Arun (1.7k points)

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If a + b = 25 and `a^2 + b^2 = 225`, then find

asked Jan 17, 2022 in 8th-maths by vaibhav (1.7k points)

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If x – y = 13 and xy = 28, then find `x^2 +

asked Jan 17, 2022 in 8th-maths by sumit (1.6k points)

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If m – n = 16 and `m^2 + n^2 = 400`, then find

asked Jan 17, 2022 in 8th-maths by krutika (1.7k points)

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If `a^2 + b^2 = 74` and ab = 35, then find a +

asked Jan 17, 2022 in 8th-maths by nikhil (1.8k points)

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Verify the following: `(ab + bc) (ab – bc) + (bc + ca) (bc – ca) + (ca + ab) (ca – ab) =

asked Jan 17, 2022 in 8th-maths by Simran (1.8k points)

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Verify the following: `(a + b + c) (a^2 + b^2 + c^2 – ab – bc – ca) = a^3 + b^3+ c^3 –

asked Jan 17, 2022 in 8th-maths by Simran (1.8k points)

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Verify the following: `(p – q) (p^2 + pq + q^2) = p^3 –

asked Jan 17, 2022 in 8th-maths by krutika (1.7k points)

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