AC Lim's answer to Pooh pooh bear's Secondary 2 Maths Singapore question.
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Using brackets also important to ensure the + and - sign of the product.
Date Posted:
4 years ago
You take away ( ) straightaway so the -7 have to extra careful.
- x - = + ( - time - get + result )
+ x + = + ( + time + get + result )
- x + = - ( - time + get - result)
+ x - = - ( + x - get - result)
- x - = + ( - time - get + result )
+ x + = + ( + time + get + result )
- x + = - ( - time + get - result)
+ x - = - ( + x - get - result)
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