Solve any method: 9x^2+9x=4??

2 answers:

6 0

Subtract 4 from both sides, solve using quadratic formula
ax^2+bx+c
(-b(+or-) Square Root of b^2 - 4ac)/2a

9x^2+9x-4=0
-9(+or-)Square root of 9^2-4(9)(-4)/2(9)

Solve^

svetoff [14.1K]3 years ago

4 0

9x² + 9x = 4
9x² + 9x - 4 = 4 - 4
9x² + 9x - 4 = 0
x = -9 +/- √(9² - 4(9)(-4))
 2(9)
x = -9 +/- √(81 + 144)
 18
x = -9 +/- √225
 18
x = -9 +/- 15
 18
x = -9 + 15 x = -9 - 15
 18 18
x = 6 x = -24
 18 18
x = 1/3 x = -1 1/3

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