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Factorise the following using the identity `a^2 – b^2 = (a + b) (a – b)`. `y^3 –

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

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Factorise the following using the identity `a^2 – b^2 = (a + b) (a – b)`. `y^4 –

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

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The following expressions are the areas of rectangles. Find the possible lengths and breadths of these rectangles. `x^2 + 9x +

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

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Perform the following divisions: `(– qrxy + pryz – rxyz) -: (–

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

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Factorise the expressions and divide them as directed: `(x^2 – 22x + 117) -: (x –

asked Jan 17, 2022 in 8th-maths by purvi (1.8k 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 uday (1.6k 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 uday (1.6k 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 uday (1.6k 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 yogita (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 Arun (1.7k points)

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Find the value of a, if `8a = 35^2 –

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

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Find the value of a, if `pqa = (3p + q)^2 – (3p –

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

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The human body has about 100 billion cells. This number can be written in exponential form

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

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`(-4)^4 xx(5/4)^4`

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

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`(2^-3)^2 xx (3^-2)^3`

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

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Simplify

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

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For a fixed base, if the exponent decreases by 1, the number

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

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The value of `3^5 -: 3^(–6)`

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

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If x be any integer different from zero and m, n be any integers, then `(x^m)^n` is equal

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

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Which of the following is equal to `(-3/4)^(-3)`

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

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