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NCERT Solutions Class 8 Mathematics Solutions for Exercise 9.2 in Chapter 9 - Algebraic Expressions and Identities
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Q5) Obtain the product of:
(i) xy, yz, zx
(ii) a,\ -a^2,a^3
(iii) 2,\ 4y,\ 8y^2,16y^3
(iv) a, 2b, 3c, 6abc
(v) m, -mn, mnp
Answer:
Solution:
(i) xy\times yz\times zx=x\times x\times y\times y\times z\times z
= x^2y^2z^2
(ii) a\times\left(-a^2\right)\times a^3=\ \left(-1\right)\left(a\times a^2\times a^3\right)
= -a^5
(iii) 2\times4y\times8y^2\times16y^3
=(1 x 2 x 3 x 6)(a x b x c x abc)
= 36a^2b^2c^2
(v) m x -mn x mnp = (1)(m x m x m x n x n x p)
= -m^3n^2p
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