Answer:
9 and -9
Step-by-step explanation:
x^2-81
=(x+9)(x-9) x+9=0 x-9=0
=x²+9x-9x-81 x=-9 x=9
=x²-81
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Answers & Comments
Answer:
9 and -9
Step-by-step explanation:
x^2-81
=(x+9)(x-9) x+9=0 x-9=0
=x²+9x-9x-81 x=-9 x=9
=x²-81