Asked by Nat
factorise 5x^2+8x-6
please help... will be much appriciated.
please help... will be much appriciated.
Answers
Answered by
Steve
Yeah, it's kind of tricky.
Using 6,1 for factors will make things kind of lop-sided, so I'd go with 2 and 3.
(5x-2)(x+3) = 5x^2 + 13x - 6 Nope
(5x+3)(x-2) = 5x^2 - 7x - 6 Nope
I think we're out of luck. The discriminant is 64+120 = 184, which is not a perfect square, so you can't factor this over the integers.
Using 6,1 for factors will make things kind of lop-sided, so I'd go with 2 and 3.
(5x-2)(x+3) = 5x^2 + 13x - 6 Nope
(5x+3)(x-2) = 5x^2 - 7x - 6 Nope
I think we're out of luck. The discriminant is 64+120 = 184, which is not a perfect square, so you can't factor this over the integers.
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