Tuesday 7 October 2014

ALGEBRA 3

Expand 3x(4x – 5)

Solution

= 3x(4x – 5)

= (3x x 4x) – (3x x 5)

= 12x2 – 15x

Hence 3x(4x – 5) = 12x2 – 15x

TRY THIS……………


Expand 7a(7a – 4)

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