Factorize the expression 2s 2 - 3st - 2t 2 - WAEC Mathematics 1993 Question
Factorize the expression 2s\(^2\) - 3st - 2t\(^2\).
A
(2s - t)(s + 2t)
B
(2s + t)(s - 2t)
C
(s + t)(2s - 1)
D
(2s + t)(s -t)
correct option: b
2s\(^2\) - 3st - 2t\(^2\)
= 2s\(^2\) - 4st + st - 2t\(^2\)
= 2s(s - 2t) + t(s - 2t)
= (2s + t)(s - 2t)
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