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hopeeast8
27.06.2019 •
Mathematics
Susu is solving the quadratic equation 4x2 – 8x – 13 = 0 by completing the square. her first four steps are shown in the table. in which step did susu first make an error? step 1 step 2 step 3 step 4
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Ответ:
Step 2
Step-by-step explanation:
Susu is solving the quadratic equation
by completing the square
To apply completing the square method we need to get x^2 alone
Susu added 13 on both sides . So step 1 is correct
When we factor out 4, we divide both terms by 4
Susu forgot to divide 8 by 4
So , error in step 2
Ответ:
Step 3
Step-by-step explanation:
when solving by completing the square you are supposed to do (b/2)^2 and then add that to both sides.
In your example (-8/2)^2=16
You are supposed to add sixteen to both sides not 64
Susu forgot to divide 8 by 2 before she raised it to the to the second powerm that is why she got 64, which is incorrect.
Ответ:
there's your answer