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Firstly multiply out the brackets. This would equal 5x + 15 < 60. Now move all the x terms onto one side and all the constants on to the other side. You can do this be doing minus 15 to both sides. 5x ...

If you are given the equation y = x²+4x+1 First you determine what is in the squareMake sure your x² term has no coefficientFind half the coefficient of the x termThat is your brack...

If the function is even, f(x) = f(-x).cos(-x) is the same value as cos(+x) therefore the function is even. Its graphical property is that it is symmetrical about the y axis as all even functions are.

since the values are too difficult to calculate from factorising, we use the quadratic formula ((-b)±(b^2-4ac)^(1/2))/(2a).putting the values in as (ax^2+bx+c=0) we find the roots in exact form are;(-11+(...

When differentiating you find the gradient of the function/line, this means how fast does the function goes up or down.