Mathematics: Solve x2 + 9x + 9 = 0. quantity of negative 9 plus or minus 3 square root of 5 all over 2 quantity of 9 plus or minus 3 square root of 5 all over 2 quantity of negative 9 plus or minus square root of 117 all over 2 quantity of 9 plus or minus square root of 117 all over 2

Solve x2 + 9x + 9 = 0. quantity of negative 9 plus

Ответ:

devin3634

06.01.2022

X = (-b (+-)sqrt (b^2 - 4ac) / 2a

x^2 + 9x + 9 = 0
a = 1
b = 9
c = 9

x = -9 (+-) sqrt (9^2 - 4(1)(9)) / 2(1)
x = -9 (+-) sqrt (81 - 36) / 2
x = -9 (+-) sqrt (45) / 2
x = -9 (+-) sqrt (9 * 5) / 2
x = -9 (+-) (3 sqrt 5) / 2 <===

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Ответ:

rosemarybooker

22.03.2020

Mathematics

i need help

Step-by-step explanation:

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Solve x2 + 9x + 9 = 0.

quantity of negative 9 plus or minus 3 square root of 5 all over 2
quantity of 9 plus or minus 3 square root of 5 all over 2
quantity of negative 9 plus or minus square root of 117 all over 2
quantity of 9 plus or minus square root of 117 all over 2

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