Q. 14.0( 2 Votes )

Find the product of the following pairs of monomials:

i. 3, 7x

ii. – 7x, 3y

iii. – 3a, 5ab

iv. 5a2, – 4a

v.

vi. Xy2, x2y

vii. x3y5, xy2

viii. abc, abc

ix. xyz. x2yz

x. a2b2c3, abc2

Answer :

i. 3, 7x


= 3×7x


= 21x


ii. – 7x, 3y


= -7 ×3×x ×y


= -21xy


iii. – 3a, 5ab


= -3 ×5 ×a ×a ×b


= -15 b


= -15


= -15 b


iv. 5a2, – 4a


= (5


= -20)


= -20


v.


= )


= ( )


= ( )


=


vi. Xy2, x2y


= y2 + 1


=


vii. x3y5, xy2


=


=


viii. abc, abc


= a× b× c × a × b × c


= (a × a) × (b × b) x ( c × c)


= × ×


=


ix. xyz. X2yz


= ( x × x2 ) x (y × y) × (z× z)


= x3


x. a2b2c3, abc2


= (a2 × a) x ( b2 × b)x ( c3 × c)


= × ×


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