Question

Solve by extracting roots. Round your answers to two decimal places.

2.8x² = 2x² + 22.1

Answer 1

+/- 5.26

Explanation:

Subtract both sides by 2x^2

.8x^2 = 22.1

Divide by .8

x^2 = 27.625

Take the square root on both sides

x = +/- 5.26

It's either a positive or a negative number because the sign doesn't matter when you square the number so we have to account for both possibilities.