A student performed the following steps to find the solution to the equation x^2-2x-15=0 Where did the student go wrong?
STEP 1: factor the polynomial into (x+3) and (x-5)
STEP 2: x+3=0 and x-5=0
STEP 3: x=3 and x=-5

A) the student did not make any mistakes, the solution is correct
B) in step 3
C) in step 1
D) in step 2

Question

A student performed the following steps to find the solution to the equation x^2-2x-15=0 Where did the student go wrong?
STEP 1: factor the polynomial into (x+3) and (x-5)
STEP 2: x+3=0 and x-5=0
STEP 3: x=3 and x=-5

A) the student did not make any mistakes, the solution is correct
B) in step 3
C) in step 1
D) in step 2

anonymous · Answer

@VeritasVosLiberabit  could you maybe help me? :)

anonymous · Answer

So take a look at the signs in Step 2 and Step 3. When the student solved for x, he made a slight error

anonymous · Answer

so its b then?

anonymous · Answer

Maybe, explain why.

anonymous · Answer

To help you: The student is solving the for the roots within the quadratic equation. This is all of the possible numbers where the equation equals 0=0