Question

Solve the equation 9x^2 + 8x – 5 = 3x^2to the nearest tenth.

Answer 1

X= {-1.8, 0.5}

Explanation:

hope it helps much

Answer 2

9514 1404 393

Answer:

x ≈ {-1.8, 0.5}

Explanation:

I find a graphing calculator to be about the easiest way to solve these. It is convenient to put the equation into the form f(x) = 0. Here we can do that by subtracting 3x^2 from both sides.

9x^2 +8x -5 = 3x^2 . . . . . given

6x^2 +8x -5 = 0 . . . . . . . . subtract 3x^2

The solutions to this are the x-intercepts of the graph:

x = -1.8 or +0.5