factorise y^2 +y-72
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Answered by
6
Answer:
(y+9)(y-8)
Step-by-step explanation:
y^2+y-72
=y^2+(9-8)y-72
=y^2+9y-8y-72
=y(y+9)-8(y+9)
=(y+9)(y-8)
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