Question 8.Factorise the following expressions
(a) 54min + 81mºn?
(b) 15x2y3z + 25x3y²z + 35x?y?z?
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Answer:
a)(2×3×3×3×m^3^×n)+(3×3×3×3×3×m^3×m×n×n)
=3×3×3×m^3n(2+3m×n)
=27m^3n(2+3mn)
b)15x2y3z + 25 + x3y2z 35x2y2z2 = 5x2y2z (3Y + 5x + 7)
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