for what values of p will the quadratic equation

Question

b²-4ac=0

(p+4)² - 4(1) (p+7)=0

Answer 1

I will start you off.

 

(p + 4)² - 4(p + 7) = 0

 

(p + 4)(p + 4) - 4p - 28 = 0

 

p² + 8p + 16 - 4p - 28 = 0

 

p² + 4p - 12 = 0

 

 

You can use FOIL to finish solving for p.