Solve 3x^2 + 13x + 14 = 0

Firstly, you need factorise.a = 3 b = 13 c = 14Find 2 numbers which add to make b(13) and multiply to make ac(42). These numbers are 6 and 7You can now split up the x coefficient to: 3x^2 + 6x + 7x + 14. You can now factorise each "half" to get to: 3x(x+2) + 7(x+2)Factor out "x+2" to get (3x+7)(x+2) = 0So the solutions are x = -7/3 or x = -2

CW

Related Maths GCSE answers

All answers ▸

A triangle has 3 angles of 60 degrees, (5y-40) degrees, and (2y+20) degrees. Show that the triangle is equilateral.


When do I use Sin, Cos and Tan?


How find the values of x when x^2+8x+16=0?


Differentiate f(x) = 3x^2+5x+3