4 x raised to powe
r 2 + 8 x minus 5
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4x² + 8x - 5
=> 4x² + ( 10 - 2 ) x - 5
=> 4x² + 10x - 2x - 5
=> 2x( 2x + 5 ) - ( 2x + 5 )
=> ( 2x + 5 ) ( 2x - 1 )
=> 4x² + ( 10 - 2 ) x - 5
=> 4x² + 10x - 2x - 5
=> 2x( 2x + 5 ) - ( 2x + 5 )
=> ( 2x + 5 ) ( 2x - 1 )
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