2 answers:
Answer:
x=2
Explanation:
We will need to add our like terms. In this case:
x2 (which is exactly the same as 2x) and -18x are like terms because they both have a coefficient of x.
81 and 49 are like terms because they are both constants.
x2-18x+81=49
2x-18x+81=49
-16x+81=49
-16x=-32
x=2
Answer:
x = 2, 16.
Step-by-step explanation:
x2 - 18x + 81 = 49
(x - 9)^2 = +/- 7
x - 9 = +/- 7
x = 7 + 9, -7 + 9.
x = 2, 16.
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