Factorise 2x^2 + 7x + 3

by factorising it we get , (2x + 1) • (x + 3)

Step-by-step explanation:

for solution see the attached picture. ...

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.