4x - x - 3 = 0
Combining like terms: 3x - 3 = 0 or 3*(x - 1) = 0
Dividing both sides of the equation by 3, x - 1 = 0 and that implies that x = 1
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2sinx+1 equals 0
For y - 2y - 3y equals 0, y equals 0.
factorise it into brackets. The equation is actually x2-6x+0. So into brackets it will be (x-6)(x+0) = 0. From here, to solve the equation, make either of the brackets = 0 by substituting a value for x. In this instance x = 0 or 6.
x3 + 2x2 - 8x + 5 = 0 x(2x - 8) + 5 = 0
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