Question

Using quadratic formula to solve 0.7x^2=4.2x+0.7 what is the solution set.

Answer 1

since your function is:

0.7x^2 - 4.2x - 0.7 = 0

then:

a = 0.7
b = -4.2
c= -0.7

Then sub into the quadratic formula. That's probably as much as I can show you without straight-up giving you an answer.