Sunday, July 21, 2013

Factorisation




Resolve into factors:
2 + m – m2




Answer:
= 2 +2m - m – m2
=2(1 + m) – m(1 + m)
= (2 – m)(1 + m)

Resolve into factors:
98 – 7y – y2



Answer:
98 – 7y – y2
= 98 – 14y + 7y – y2
= 14(7 – y) + y(7 – y)
= (14 + y)(7 – y)




Resolve into Factors:
y2- 78 + 7y 



Answer:
Y2-78 + 7y
= y2+ 7y -78
= y2+ 13y – 6y -78
= y(y +13) – 6(y + 13)
= (y + 13)(y – 6)









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