Tyree Frederick

Mathematics

20 April, 04:10

Mariah started to find the solutions of

x2 + 4x + 1 = 0. Her work is shown below.

x2 + 4x + 1 = 0

x2 + 4x = - 1

x2 + 4x + 4 = - 1 + 4

(x + 2) 2 = 3

Which describes the solutions of the equation?

Since - 2 and 3 are both rational, the sum and difference are rational.

Since - 2 and StartRoot 3 EndRoot are both rational, the sum and difference are rational.

Since - 2 is rational and StartRoot 3 EndRoot is irrational, the sum and difference are irrational.

Since StartRoot 2 EndRoot is rational and StartRoot 3 EndRoot is irrational, the sum and difference are irrational.