x^2-17x+72 split the middle term
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Step-by-step explanation:
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Step-by-step explanation:
x²-17x+72
x²-(9+8)x+72 LCM of 72 is 2×2×2×3×3=9
and 8
x²-9x-8x+72
x(x-9)-8(x-9)
(x-9)(x-8)
either. | or
x-9=0. | x-8=0
x=9. | x=8
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