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4 years ago

Help plzzzz x2-18x+81=49

2 answers:

7 0

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

inna [77]4 years ago

6 0

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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