Solve x2 - 8x+ 8 = 0 by completing the square,
1 answer:
Answer:
Step-by-step explanation:
- 8x+ 8 = 0
we divide the coefficient of the X by half :
in this case: 8x/2 = 4 , then we do the following
to the result obtained (4) squared: 4^2=16
we sum and subtract by 16 to maintain the balance of equation:
- 8x+ 16-16+8 = 0
we have:
-16 +8=0
=16-8
= 8
we write the square root on both sides of the equation:
we know:
so we have:
abs(x-4)=
abs(x-4)=2
we have:
finally we have:
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