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Free_Kalibri [48]
2 years ago
12

Solve: x2 - 2x + 1 = 4 Please help me

Mathematics
1 answer:
inn [45]2 years ago
7 0

Let's solve your equation step-by-step.

x2−2x+1=4

Step 1: Subtract 4 from both sides.

x2−2x+1−4=4−4

x2−2x−3=0

Step 2: Factor left side of equation.

(x+1)(x−3)=0

Step 3: Set factors equal to 0.

x+1=0 or x−3=0

x=−1 or x=3

Answer:

x=−1 or x=3

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We need to conduct a hypothesis in order to test the claim that if there was a significant increase in the proportion of student loan debt for public and nonprofit colleges in 2014 respect to the value of 2013.:  

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z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}} (1)  

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