(x+1)^2 + x-5
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(x + 4) • (x - 1)
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( x + 1 )² + x - 5
=> x² + 1 + 2x + x - 5
=> x² + 3x - 4
=> x² + ( 4 - 1 )x - 4
=> x² + 4x - x -4
=> x( x + 4 ) - ( x + 4)
=> x² + 1 + 2x + x - 5
=> x² + 3x - 4
=> x² + ( 4 - 1 )x - 4
=> x² + 4x - x -4
=> x( x + 4 ) - ( x + 4)
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