925*3.9+5x=4.2*(x+925)
if you are in a room with 3 people and 2 are dead tell how many peoples are there
7+5+3=2x+10 find the value of x
7+5+3=2x+10
sin(30)*1.8
factorise:
x²-x-20
$f(x) = -15$ at $x = 20$ u
Find the gradient of the tangent line to $f(x) = -15$ at $x = 20$ u
3$\frac{\dy}{\dx}$
(a^2 + b^2) (a^2 - ab - b^2)
