2 years ago

A student performed the following steps to find the solution to the question x^2 - 2x - 15 = 0. Where did the student go wrong?

Mathematics

1 answer:

nataly862011 [7]2 years ago

7 0

Answer:

D In step 3

Step-by-step explanation:

Given polynomial: x² - 2x - 15 = 0

Step 1: factor the polynomial ⇒ (x + 3)(x - 5) = 0

Step 2: x + 3 = 0 and x - 5 = 0

Step 3: x = -3 and x = 5

x - 5 = 0

Add 5 to both sides:

⇒ x - 5 + 5 = 0 + 5

⇒ x = 5

You might be interested in

Which of the following statements are true for this diagram?

ch4aika [34]

Answer: ABC-ODG

Step-by-step explanation: They all are the same angles.

4 0

3 years ago

.help me solve please and thank you✨

svetlana [45]

The first one, SAS Postulate

8 0

3 years ago

Using the 3 functions below, make the desired transformation(s) to the correct function and describe the transformation(s). Writ

Eduardwww [97]

Answer:

The transformation of $g(x)$ to $k(x)$ consists in a vertical translation. The new equation is $k(x) = -12\cdot x-6$ .

Step-by-step explanation:

Let $g(x) = -12\cdot x - 3$ . We proceed to make the required transformations on $g(x)$ , which consists in one vertical translation, 3 units in the -y direction. That is to say:

$k(x) = g(x) - 3$ (1)

$k(x) = (-12\cdot x - 3) - 3$

$k(x) = -12\cdot x-6$

Then, the transformation of $g(x)$ to $k(x)$ consists in a vertical translation. The new equation is $k(x) = -12\cdot x-6$ .

5 0

3 years ago

What is the solution to this equation<br>x+8=-3

melisa1 [442]

Answer:

x+8=-3.

x=-3-8.

x= -11.

4 0

3 years ago

Read 2 more answers

In a survey four out of every five people prefer creamy more then crunchy peanut butter. If there are 120 people at the grocery

JulsSmile [24]

Answer:

150

Step-by-step explanation:

set up a equation-

4/5=120/x

x= people buying peanut butter.

120/4=30

30 x 5=150

3 0

3 years ago