Fully simplify this equation; 3x^3 - x(3x+36) = 0
The first step is to multiply out the bracket
3x3 - 3x2 - 36x = 0
Then remove the common factor 3x
3x(x2 - x - 12) = 0
Then factorise the bracket, by looking for two numbers which multiply to give -12, and add to give -1
3x(x - 4)(x + 3) = 0
RO
Related Maths GCSE answers
All answers ▸a) You area told that y is proportional to x2 and that when y = 75, x = 5. Find a formula for y in terms of x. y = x b) Find the value of y when x = 3. c) Find the value of x when y = 1200.
solve x/2 + 11 = 15
Find the values of a, b and c in the equation: (5x + 3)(ax + b) = 10x^2 + 11x + c.
Rearranging equations