Answer:
X=9 or x=-9
Step-by-step explanation:
X^2=81
Can be written as
x^2-81=0
Factorize by the property:
a^2-b^2=(a-b)(a+b)
So the expression becomes:
(x-9)(x+9)=0
Therefore, either x-9=0or x+9=0
Then the solutions are x=9 or x=-9
Answer:
Step-by-step explanation:
12.
Hope this helps!
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It is A, 60° because 180° (degree of the whole triangle) divided by the three angles is 60.
There would be 1/12 of the cake left.
