Question

factorise the following 2a^2+9a+10 in exercise 3.6​

Answer 1

Step-by-step explanation:

When we multiply 10 with 2a^2 we got 20a^2.So now on multiplying we need 20a^2 and addition/subtraction we need 9a.The two numbers are 5a and 4a.

=2a^2+5a+4a+10

=a(2a+5)+2(2a+5)

=(a+2)(2a+5)