Question

9x²-12x+20=0 solve by formula method ​

Answer 1

Answer:

9x2–12x+20=0

9x2–12x+4+16=0

(3x−2)2=−16

3x−2=±4i

3x=2±4i

x=2±4i3

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

a = 9 , b= -12 , c =20

${b}^{2 } - 4ac$

${ - 12}^{2} - 4(9)(20)$

$144 - 720$

$576$

$x = - b \binom{ + }{ - } \sqrt{ {b}^{2} - 4c}$

$12 \binom{ + }{ - } \sqrt{576}$

$12 \binom{ + }{ - } 24$

$12 + 24 \: or \: 12 - 24$

$36 \: \: or \: \: - 12$