OpenStudy (anonymous):

What are the x-intercept(s) of the graph of y − 3 = x2 + 4x?

6 years ago
OpenStudy (campbell_st):

rewrite the equation as $y = x^2 + 4x + 3$ can you factorise this..?

6 years ago
OpenStudy (campbell_st):

to find the x- intercepts let y = 0 then $x^2 + 4x + 3 = 0$

6 years ago
OpenStudy (anonymous):

but like isnt it a rule that a cant equal 0?

6 years ago
OpenStudy (campbell_st):

the rule for x intercepts is that y = 0.... you are finding the points on the x-axis.... this is where y is always equal to zero

6 years ago
OpenStudy (anonymous):

no. A cant equal zero... and it does in this equation

6 years ago
OpenStudy (campbell_st):

you let the equation equal zero $x^2 + 4x + 3 = 0$ so can you factorise

6 years ago
OpenStudy (anonymous):

@marmar3000 , if you're referring to the coefficients in the equation $$\large y=ax^2+bx+c$$, then in your equation a is not zero...

6 years ago
OpenStudy (campbell_st):

now you need to find the factors of 3 that add to 4

6 years ago