As you can see I have shown you two different answers the one on top is my teach

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secondary 3 | E Maths
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secondary 3 E Maths Singapore

As you can see I have shown you two different answers the one on top is my teacher’s answer and the one below is the one I tried to solve and I don’t understand why the answers are different for my teacher’s answer(the top one),I don’t understand why the second line the whole equation changes 15-7y-2y^2 suddenly becomes 2y^2+7y-15 I totally dont understand the change in the second line for the + and - signs and my last answer u can see is y=5 while my teacher is one is y=-5 someone please help and explain to me very clearly thank you so much

Date Posted: 5 years ago

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Christmas MT

5 years ago

Your equation is wrong. It should be -2y^2 instead of 2y^2 when you bring over

Ria

5 years ago

Sorry I really don’t understand what you mean can u elaborate further please?

Ria

5 years ago

Thank you so much for your answer but I want to clarify is my teacher’s answer wrong? because I really do not understand the second line for my teacher’s answer also my teacher got the answer as -5

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done {{ upvoteCount }} Upvotes

clear {{ downvoteCount * -1 }} Downvotes

Do look at the working~

Date Posted: 5 years ago

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