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Factorise a3-a2-ab+a+b-1, ab(c2+d2)-a2cd-b2cd, 2ab2-aby+2cby-cy2, ax+2bx+3cx-3a-6b-9c

Factorise
a3-a2-ab+a+b-1,  ab(c2+d2)-a2cd-b2cd, 2ab2-aby+2cby-cy2,  ax+2bx+3cx-3a-6b-9c

Grade:8

1 Answers

Charan deep
13 Points
4 years ago
a3 - a2 - ab +a + b - 1 
a3 - a2 - ab + b + a - 1 
a2 ( a -1 ) -b ( a - 1 ) + 1( a - 1 )
=(a2-b+1) (a-1)

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