factorise :x to the power of 2 - x - 72
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2
Answer:
(x-9)(x+8)
Step-by-step explanation:
x²-x-72
= x²-(9-8)x-72
= x²-9x+8x-72
=x(x-9)+8(x-9)
=(x-9)(x+8)
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Answered by
0
Answer:
=》 x2-x-72
=》 x2-9x+8x-72
=》 x(x-9) + 8(x-9)
=》 (x+8)(x-9)
=》 x+8=0 x-9=0
x=9 ans.
=》 x=-8 it is not possible.
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