MaxWong

\(\sqrt{-x} = (-3x)^3\\ \sqrt{-x} = -27x^3\\ -x = 729x^3\\ 729x^3+x = 0\\ x(729x^2 + 1) = 0\\ x = 0 \text{ or }x^2 = -\dfrac{1}{729}\\ x^2 + \dfrac{1}{729}=0\\ x = \dfrac{\pm\sqrt{0^2-4(1)(1/729)}}{2}\\ x = \dfrac{1}{27}i\text{ or }x=-\dfrac{1}{27}i\text{ or }x = 0\)

You write c = square root 653 or - square root 653 for that.

Distribute -4n to all terms in the bracket

\((n^2-6n+3)(-4n)\\ =-4n^3+24n^2-12n\)

\(c^2 = 22^2+13^2\\ c^2=653\\ c=\pm\sqrt{653}\)

That is 3000000000

(4 + 2i)(3 – 5i) = (3 – 5i)(4 + 2i)

\(\dfrac{6}{35}\\ =\dfrac{6}{35}\times 100\%\\ =\dfrac{600}{35}\%\\ =\dfrac{120}{7}\%\)

1st term = 1 = 1/1

2nd term = 1/2 

3rd term = 1/3

...

nth term = 1/n

Because D and F are the mid-points of BC and AC respectively, DF || AB. Therefore, angle AEF should equal 40 deg.

Let G be the intersection point of AD and EF.

Angle DAE + 40 deg = angle AGF

Angle DFE + angle ADF = angle AGF

Because angle DAE = angle DFE,

angle ADF should equal 40 deg :D

how long is the noodle? Its 16 inches long and it's given in the question. Next time, read the question carefully :D