6.2.3 Algebraic Expressions (III), PT3 Practice


Question 11:
(a)
Expand: x (2 + y)

(b)
Express  5 6y 3x5 12y  as a single  fraction in its simplest form.

Solution:
(a)
x (2 + y) = 2x + xy

(b)
5 6y 3x5 12y = 5×2 6y×2 3x5 12y = 10( 3x5 ) 12y = 103x+5 12y = 153x 12y = 3 ( 5x ) 12 4 y = 5x 4y


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