Solve for x: x2 + 8x = -1

1 answer:

7 0

$x^2+8x=-1\\
x^2+8x+16-16=-1\\
(x+4)^2=15\\
x+4=\sqrt{15} \vee x+4=-\sqrt{15}\\
x=-4+\sqrt{15} \vee x=-4-\sqrt{15}$

You might be interested in

bearhunter [10]

Answer:

x = 0, Need the steps?

STEPS:

9x - 7 = -7 (Original Problem)

9x = 0 (Add 7 to both sides)

x = 0 (Divide both sides by 9)

8 0

3 years ago

REY [17]

The 16-ounce soft drink for $1.99 is better because it may be 40 cents more but it's also bigger :)

7 0

2 years ago

Alik [6]

Answer:

3.25×10⁴

..................

4 0

3 years ago

ankoles [38]

Answer:

Step-by-step explanation:

7 0

2 years ago

anygoal [31]

Answer:

Step-by-step explanation:

5x3x4= $60{m3}$

6 0

2 years ago