Question

Approximate the solutions of 0.51x2 − 0.81x − 4.2 = 0.

Answer 1

approximate using what method?

Answer 2

it did not say

Answer 3

Do you have a graphing calculator. that is the easiest way to do this problem. The solutions will be wherever the graph crosses the x-axis.

Answer 4

i don't T^T

Answer 5

use the quadratic formula:

x = (0.81 +- sqrt(0.81^2 + 4*4.2*0.51))/1.02

put that in your calculator and it should spit out an approximate solution

Answer 6

shouldn't that start with a negative .81?

Answer 7

nope, it's [-b +- sqrt(b^2 - 4ac) ] / 2a