Reflections over the x axis change the -

An energy drink company claims that its product increases students' memory levels. to support its claims, the company issues advertisements claiming that 8 out of 10 people (chosen randomly from across the country) who tried their product reported improved memory. the missing component in this study is a .

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1

Hardest math question of all time can you solve the equation. check for extraneous solutions.9∣9-8x∣ = 2x+3