Questions by krutika

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Factorise the following using the identity `a^2 – b^2 = (a + b) (a – b)`. `p^5 –

asked Jan 17, 2022 in 8th-maths

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Factorise the following using the identity `a^2 – b^2 = (a + b) (a – b)`. `8a^3 –

asked Jan 17, 2022 in 8th-maths

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

asked Jan 17, 2022 in 8th-maths

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

asked Jan 17, 2022 in 8th-maths

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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

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

asked Jan 17, 2022 in 8th-maths

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

asked Jan 17, 2022 in 8th-maths

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Take suitable number of cards given in the adjoining diagram [G`(x xx x)` representing `x^2`, R `(x xx 1)` representing x and Y `(1 xx 1)` representing 1] to factorise the following expressions, by arranging the cards in the form of rectangles: (i) `2x^2 + 6x + 4` (ii) `x^2 + 4x + 4`. Factorise `2x^2 + 6x + 4` by using the figure.

asked Jan 17, 2022 in 8th-maths

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In `2^n`, n is known

asked Jan 17, 2022 in 8th-maths

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

asked Jan 17, 2022 in 8th-maths

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The reciprocal of `(2/5)^-1`

asked Jan 17, 2022 in 8th-maths

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The multiplicative inverse of `10^(–100)`

asked Jan 17, 2022 in 8th-maths

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If y be any non-zero integer, then `y^0` is equal

asked Jan 17, 2022 in 8th-maths

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The standard form for 234000000

asked Jan 17, 2022 in 8th-maths

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Very large numbers can be expressed in standard form by using _________

asked Jan 17, 2022 in 8th-maths

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By multiplying `(10)^5` by `(10)^(–10)` we get

asked Jan 17, 2022 in 8th-maths

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asked Jan 17, 2022 in 8th-maths

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Solve the following:(i) `100^(–10)` (ii) `2^(–2) xx 2^(–3)` (iii) `(1/2)^(-2) -:

asked Jan 17, 2022 in 8th-maths

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Express `16^(–2)` as a power with the base

asked Jan 17, 2022 in 8th-maths

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Express `16/18` and `(-16)/18` as powers of a rational

asked Jan 17, 2022 in 8th-maths

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