1.

Multiply:(i) 3ab2, -2a2b3(ii) 4xy, 5y2x, (-x2)(iii) 2m, -5n, -3p

Answer»

(i) (3ab2) × (-2a2b2

= (+) × (-) × (3 × 2) × (a × a2) × (b2 × b3

= -6a3 b5

(ii) (4xy) × (5y2x) × (-x2)

= (+) × (+) × (-) × (4 × 5 × 1) × (x × x × x2) × (y × y2)

= -20x4y3

(iii) (2m) × (-5n) × (-3p) 

= (+) × (-) × (-) × (2 × 5 × 3) × m × n × p

= + 30mnp 

= 30 mnp



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