How would you factorise x^2 + 4x + 4
This is in the form ax2 + bx + cWhere, a= 1b=4c=4To factor we have to find two numbers that:Add up to b, in this case 4Multiply together to give c, in this case also 4So we deduce that the two numbers are +4 and +4 as;2 + 2 = 4, b2 x 2 = 4, c Therefore the factorised form is:(x+2)(x+2)As both the brackets are the same We can express this as (x+2)2
TB
Related Maths GCSE answers
All answers ▸A ladder of length 6.5m is leaning against a vertical wall. The foot of the ladder is 1.5m from the wall. Calculate the distance the ladder reaches up the wall to 3 significant figures.
L1: y=3x-2 & L2: 3y-9x+5=0, show these two lines are parallel
Solve the inequality: x^2 - x < 12
Factorise fully 20x^2 - 5