$x^2+4x+1=0\\\\\underbrace{x^2+2x\cdot2+2^2}_{(x+2)^2}-2^2+1=0\\\\use\ (a+b)^2=a^2+2ab+b^2\\\\(x+2)^2-4+1=0\\\\(x+2)^2-3=0\\\\(x+2)^2=3\iff x+2=\sqrt3\ or\ x+2=-\sqrt3\\\\\boxed{x=\sqrt3-2\ or\ x=-2-\sqrt3}$

7 0

3 years ago

Read 2 more answers

Austin needs to memorize words on a vocabulary list for German class he has memorized 22 of the words which is one half of the l

Marizza181 [45]

Answer:

Step-by-step explanation:

8 0

3 years ago

The product of 9 and number (x) is 88. Which equation shows this relationship?

Digiron [165]

This equation is
9*x =88

5 0

3 years ago

The regression line for the given data is = 5.044x + 56.11. determine the residual of a data point for which x = 2 and y = 66.

iren [92.7K]

Do you have answer choices ?

5 0

3 years ago