Solve any method: 9x^2+9x=4??
2 answers:
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^
9x² + 9x = 4
9x² + 9x - 4 = 4 - 4
9x² + 9x - 4 = 0
x = <u>-9 +/- √(9² - 4(9)(-4))</u>
2(9)
x = <u>-9 +/- √(81 + 144)</u>
18
x = <u>-9 +/- √225
</u> 18
x = <u>-9 +/- 15</u>
18
x = <u>-9 + 15</u> x = <u>-9 - 15</u>
18 18
x = <u>6</u> x = <u>-24</u>
18 18
x = 1/3 x = -1 1/3
<u />
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