Solve the equation -9x = 81x^2 . Type your answer(s) exactly in the following form x = a, x = b. Here a and b are your numerical solutions. Leave exactly one space between x, equal sign, and your answer. ^2= 2nd power
How would I write that as a final answer?
2006-11-20 16:14:38 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
-9x = 81x² ≡ 81x² + 9x + 0 = 0
For cuadratics with the form ax² + bx + c = 0 use this formule:
x = [-b± √(b²- 4ac)] / (2a)
so:
x = [-9 ± √(9² - 4(81)(0))] / (2(81))
x = [-9 ± √(9²)] / 162
x = [-9 ± 9] / 162
x = a = 0
x = b = -18 / 162 = -9 / 81 = -1 / 9
substitute and confirm it 0 = 0 for both a and b answers.
2006-11-20 16:35:28 · answer #1 · answered by JAGC 4 · 0⤊ 0⤋
the solutions would be x =0, x = -1/9
2006-11-20 16:18:15 · answer #2 · answered by shamu 2 · 0⤊ 0⤋
x = -(1/9)
x = 0
2006-11-20 16:18:50 · answer #3 · answered by gp4rts 7 · 0⤊ 0⤋
The solutons are:
x = 0
or x = -1/9
2006-11-20 16:20:51 · answer #4 · answered by jonsinher 4 · 0⤊ 0⤋
math is gay like seaguls
2006-11-20 16:30:08 · answer #5 · answered by Anonymous · 0⤊ 0⤋