Factorise: 4(x+y)2 – 28(x+y) – 49

Dear Student,


Assuming that your question is4x+y2 - 28x+y +49=2x+y2 - 2 7  2 x+y + 72= 2x+y - 7 2                                       Since a-b2=a2-2ab+b2 =2x+2y-72=2x+2y-7 2x+2y-7   ANS...

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  • 1
=(8x+8y)-(28x-28y)-49
=-20x+36y-49
  • -2
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