Alrighty
remember

means

and

and

for all real values of x
so

means

means

which simplifies to
1=x²+4x-5
minus 1 both sides
0=x²+4x-6
use quadratic formula or complete the square

and

2 solutions
part a y= x × 100
Step-by-step explanation:
1 bar is 100 calories so you would times it by 100 for every bar