Factorise the following:
x2 + 7x + 12

(x+4)(x+3)

Step-by-step explanation:

x^2+4x+3x+12

take x out of each

x(x+4)+3x+12

take 3 out

x(x+4)+3(x+4)

(x+3)(x+4)

D

Step-by-step explanation:

Given that Svana wants to solve the equation 1/2x - 1.0675 = 3x - 4145.

This equation is a system of equations which can be solved by using simultaneous equation methods.

But if she uses a graphing program to graph the equations y = 1/2x - 1.0675 and y = 3x - 4.145

The solution of 1/2x - 1.0675 = 3x - 4.145. Will be the point of intersection of the two equation.

Trace the point of intersection to the x - axis and also to the y - axis.

The solution to the system of equations is ( 1.231, - 0.452 )