Factorize the expression 2s\(^2\) - 3st - 2t\(^2\)
MATHEMATICS
WAEC 1993
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 Answer: B. (2s + t)(s - 2t)
Explanation
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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