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Question
40+3x-x² factorise the following
40+3x-x² factorise the following
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Solution
40+ 3x - x²
=> -x² + 3x + 40
=> -x² + (8 - 5)x + 40
=> -x² + 8x - 5x +40
=> -x(x - 8) - 5(x - 8)
=> (-x -5) (x - 8)
OR
=>(x+5)(8 - x)
=> -x² + 3x + 40
=> -x² + (8 - 5)x + 40
=> -x² + 8x - 5x +40
=> -x(x - 8) - 5(x - 8)
=> (-x -5) (x - 8)
OR
=>(x+5)(8 - x)
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