b) Factorise :
72 - X - X2
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2
Answer:
Your answer
Step-by-step explanation:
x2 – x – 72 = x2 – 9x + 8x – 72
= x(x - 9) + 8(x - 9)
= (x – 9) (x + 8)
Answered by
1
Answer:
=>72 - X - X2= (8-X)(9+X)
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