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Question

Add: [2 MARKS]

(i) 3x35x2+8x+10,
15x36x23 and
9x24x+15

(ii) 3ab22b2+a2,
5a2b2ab23a2 and
8a25b2

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Solution

Each Point: 1 Mark

(i) (3x35x2+8x+10)+(15x36x23)+(9x24x+15)

=3x35x2+8x+10+15x36x23+9x24x+15

Bringing like terms together, we get,

=3x3+15x35x2+9x2+8x6x4x+1023+15

=18x3+4x22x+2


(ii) (3ab22b2+a2)+(5a2b2ab23a2)+(8a25b2)

=3ab22b2+a2+5a2b2ab23a2+8a25b2

Bringing like terms together, we get,

=3ab22ab22b25b2+a23a2+8a2+5a2b

=5a2b+ab2+6a27b2

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