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complete the square to solve the equation below. check all that apply.

x^2 + 8x - 1 = 19

Complete The Square To Solve The Equation Below Check All That Apply X2 8x 1 19 class=

Sagot :

x=-10,x=2.I hope this helps.

Answer:

B and D

Step-by-step explanation:

First take the equation and subtract 19 on both sides. You get x^2+8x-20=0

using the quadratic formula you get x= (-8 + or - root (8^2 -4(1)(-20)))/ 2(1)

simplify it and you get x= (-8 +or- 12) / 2  

Separate the equation into two and you get (-8 + 12) / 2    and (-8 - 12) / 2

first one gives: 4/2=2

second gives -20/2=-10

answer x=-10,2

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