Simplify (x+4)^(2)-(x-2)^(2)
Treat the question, (x+4)2-(x-2)2 as a2-b2 where we can simplify as (a+b)(a-b). ie. (x+4+x-2)(x+4-x+2) *be careful about change of signsWe then get (2x+2)(6) which expands to 12x+12 and we can then simplify to 12(x+1).
LT
Related Maths GCSE answers
All answers ▸In a village the number of houses and the number of flats are in the ratio 7 : 4 the number of flats and the number of bungalows are in the ratio 8 : 5 There are 50 bungalows in the village. How many houses are there in the village?
In a sale a bag is reduced by 30%. The bag is now £31.50. Work out the original price of the bag.
Prove algebraically that the straight line with equation x = 2y + 5 is a tangent to the circle with equation x^(2) + y^(2) = 5
If -3x + 10y = -100 and 13x + 10y = 60, solve for x and y.