factorise x^2-18x+81
Answers
Answered by
61
x²-18x+81
P=81 S=-18
x²-9x-9x+81
x(x-9)-9(x-9)
(x-9) (x-9)
x=9 x=9
P=81 S=-18
x²-9x-9x+81
x(x-9)-9(x-9)
(x-9) (x-9)
x=9 x=9
NOTkethan:
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Answered by
28
by middle term factorisation
x2-9x-9x+81
x(x-9)-9(x-9)
(x-9)(x-9)
(x-9) squared
x2-9x-9x+81
x(x-9)-9(x-9)
(x-9)(x-9)
(x-9) squared
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