Thread: Simultaneous Equations.

I was wondering if you could doublecheck this question please:

g) and
y = 4 and x = 2

How would I do this?

h) and

Originally Posted by JibblyJabbly

I was wondering if you could doublecheck this question please:

g) and
y = 4 and x = 2

no

How would I do this?

h) and

g)







and


h)





factor and use the zero product property to solve for x

In case a graph helps...

g) . The red line is and the blue line is .



Clearly solutions are

h) . The red line is and the blue line is .



Clearly solutions are

The value of y can be calculated just by substituting the value of x or by the graph.

Yet another way to do (g): and :

If x and y are not 0, , [tex]1= x[/itex]. And if x= 1, what is y?

That was "if x and y are not 0". It is easy to check that y is 0 if and only if x is and x= y= 0 satifies both equations.