Question

Pls help. Pls help. Solve the equation by using the quadratic formula. ((5)/(8))x - 8x + (5)/(2)=0
yesterdayReport Abuse

Answer 1

20/59

Answer 2

For the quadratic equation
ax² + bx + c = 0

The quadratic formula is
. . . . . . . . . _______
. . . .− b ±√b² − 4ac
x = ---------------------
. . . . . . . . 2a

Now substituting the values
. . . . . .___________
− 8 ±√(8)² − 4(1)(−5)
---------------------------
. . . . . . . 2(1)
. . . . . .______
− 8 ±√64 + 20
---------------------
. . . . . . 2
. . . . . .__
− 8 ±√84
-------------
. . . . 2
. . . . . . . __
− 8 ± 2√21
----------------
. . . . 2
. . . . . . . . . .__
[ x = − 4 ±√21 ]

Answer 3

\[\frac{5 x}{8}-8x+\frac{5}{2}\text{=}0\]Multiply each side by -8 to get rid of the denominators \[-8\left(\frac{5 x}{8}-8x+\frac{5}{2}\right)=-8*0 \]and then simplify.\[-20+59 x=0\]Put -20 on the right side and divide both sides by 59 to yield\[x=\frac{20}{59} \]penguinbaby's first post had the correct answer.