Question

0.3x^2=1.8x+0.3

Answer 1

do u know how to factorize ?

Answer 2

yep

Answer 3

rewrite the equation

-0.3x^2 + 1.8x + 0.3 = 0

use the general quadratic formula

a = - 0.3 b = 1.8 c = 0.3

substitute into the formula ans evaluate

\[x =(-b \pm \sqrt{b^2 - 4ac})/2a\]

Answer 4

or use 0.3(-x^2 + 6x + 1) = 0

a = -1, b = 6 and c = 1

Answer 5

but can you use quadratic formula to solve it?

Answer 6

yep it will be

\[x =( -6 \pm \sqrt{6^2 - 4\times-1\times1})/(2\times-1)\]

Answer 7

i just try to solve it the solution set is (6.16,-6.16)

Answer 8

nearly... just be careful

one answer is

\[x = -3+\sqrt{10}\]

the other is

\[x = -3-\sqrt{10}\]

one of your answers is correct, the other is wrong.... -6.16 is correct... the other sound be about 0.16

Answer 9

ok