b) Factorise x^2-x-72
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1
Answer:
(x - 9) (x + 8)
Step-by-step explanation:
==: x² - x - 72 = 0
==: x² - 9x + 8x - 72 = 0
==: x(x - 9) + 8(x - 9) = 0
==: (x - 9) (x + 8) = 0
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Answered by
0
Answer:
(X+8)(x-9)
Step-by-step explanation:
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