factorise
15x²+22x-5
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Yes, x – 4 is a factor of –2x5 + 6x4 + 10x 3 – 6x2 – 9x + 4. Find all the factors of 15x4 + x3 – 52x2 + 20x + 16 by using ...
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==> 15x² + 22x - 5
Splitting the middle term,
==> 15x² + 25x - 3x - 5
==> 5x(3x + 5) - 1(3x + 5)
==> (3x + 5)(5x - 1)
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