jay47374
jay47374 jay47374
  • 04-06-2019
  • Mathematics
contestada

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

2.8x² = 2x² + 22.1

Respuesta :

SilverChain SilverChain
  • 04-06-2019

Answer:

+/- 5.26

Step-by-step 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.

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