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tino4ka555 [31]
3 years ago
14

X^2 + 6x - 18 solve for x​

Mathematics
2 answers:
Simora [160]3 years ago
4 0

Answer:

x = - 3  ± √27 or if you want it in decimal form correct to  nearest hundredth:

x = -8.20, 2.20.

Step-by-step explanation:

x^2 + 6x - 18 = 0

this will not factor so we use completing the square:

x^2 + 6x = (x + 3)^2 - 9 so:

(x + 3)^2 - 9 - 18 = 0

(x + 3)^2 = 27

x+ 3 = ±√27

x = - 3  ± √27

Roman55 [17]3 years ago
4 0
The answer :X= 8.20
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