answer for
x-a*x+b .
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ɢɪᴠᴇɴ :
( x - ᴀ ) ( x + ʙ )
= x ( x + ʙ ) - ᴀ ( x + ʙ )
= x² + ʙx - ᴀx - ᴀʙ
= x² + ( ʙ - ᴀ )x - ᴀʙ
( x - ᴀ ) ( x + ʙ )
= x ( x + ʙ ) - ᴀ ( x + ʙ )
= x² + ʙx - ᴀx - ᴀʙ
= x² + ( ʙ - ᴀ )x - ᴀʙ
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