Question

x^2 + 100x - 300000. split the middle term

Answer 1

x^2 + 100x - 300000

= x²+600x - 500x - 300000

=x(x+600) -500(x+600)

(x-500)(x+600).

hope it helps you

Answer 2

Answer:

x = 500 km/hr

Step-by-step explanation:

x²+100x-300000=0

x²+600x-500x-300000=0

x(x+600)-500(x+600)=0

(x-500)(x+600)=0

x=500 or x=(-600)

Speed cannot be negative

So, Speed of plane is 500km/hr