2 years ago

Solve the equation. - x^2 + 5x + 9 = 0

Mathematics

1 answer:

grigory [225]2 years ago

3 0

Answer:

x(1,2) = -5 ± √61) / (-2)

Step-by-step explanation:

The ABC formula of quadratic equation states

x(1,2) = (-b ± √b^2 - 4ac) / 2a

-x^2 + 5x + 9 = 0

a = -1

b = 5

c = 9

Thus x(1,2) = (-b ± √b^2 - 4ac) / 2a

= (-5 ± √(-5)^2 - 4*(-1)*9) / 2*(-1)

= (-5 ± √25+36) / (-2)

= (-5 ± √61) / (-2)

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Solve the equation. - x^2 + 5x + 9 = 0​

Solve the equation. - x^2 + 5x + 9 = 0