-8y^2+28y-60
-4(2y^2 - 7y + 15)
The discriminant is 49-120 which is negative, so there are no real factors.
I am trying to factor the expression -8y^2+28y-60 but can't get an answer that is correct.
Here is an example of how the problem is supposed to be factored. If you have 21x2-77x-28 the first thing you would do is (21x )(x ). Next you would find two numbers that multiplied into -28. After this your work would look like this (21x+7)(x-4). Now you would multiply 21x and -4 to get -84x and you would multiply 7 and x to get 7x. After that you add -84x and 7x to get the middle number in the expression which is -77x.
Could someone please show me how to factor -8y^2+28y-60?
1 answer
1 answer