Question

Which are the solutions of x2 = –7x – 8?

Answer 1

Answer:

The answer is the fourth option.

Step-by-step explanation:

You start by converting the equation into standard form, resulting in x2+7x+8. You would then use the coefficients and plug them into the quadratic formula, [-(7)+√7(7)-4(1)(8)]/2 and [-(7)-√7(7)-4(1)(8)]/2. Simplified, this would become (-7+√49-32)/2 and (-7-√49-32)/2. After adding the numbers in the square root, you are left with (-7+√17)/2 and (-7-√17)/2

Answer 2

Answer

x= -7, -1

Step-by-step explanation:

x^2= -7x- 8

x^2+ 7x+ 8 =0

x+7=0       x+1=0

x=-7          x=-1