Factorise x² + 6x + 8
A quadratic equation is written in the form: ax2 + bx + cTo factorise, we need to know what 2 numbers multiply to make ac and add to make bac= 8b=64 x 2=8 4+2 = 6We replace b for these two numbers so the equation is now: (x2 + 4x )+ (2x + 8)We then factorise these broken down equations:x(x + 4) +2(x + 4)(x + 4) is repeated so we know it’s a factor, and (x + 2) is a factor
LM
Related Maths GCSE answers
All answers ▸Solve the Simultaneous Equations -3X + 4Y=11 & X-2Y = -5 to find the values of X and Y
Expand and simplify (3X+9)(X-6)=0
How can you calculate the distance between 2 points in a grid if they're not on the same horizontal or vertical line?
For the equation y=2x+7, what is the gradient and the y intercept?