Factorise 2(x^2) +7x+3
Only factors of 2 are 1 and 2, therefore solution will take form of (2x + a)(x + b) to get 2x2 term. Only factors of 3 are 1 and 3 therefore a and b are either 1 or 3. Playing around and intuition leads us to conclude that a=1 and b=3, hence we get:
(2x + 1)(x + 3) which equals 2x2 + 7x +3, as 32x + 1x = 7x.
AR
Related Maths GCSE answers
All answers ▸There are 10 boys and 20 girls in a class. In a class test, the mean score of the boys is 77. The mean score of the girls is 80. What is the mean score of the whole class?
10 girls and 15 boys sit a test. The mean mark for the boys is 70. The mean mark for girls is 82. Work out the mean mark for the whole class.
Expand and simplify 3(m + 4) – 2(4m + 1)
Solve the simultaneous equations 3x + y = 4 x + y = 2