72.5k views
3 votes
Can you help me with my work

Can you help me with my work-example-1
User Koque
by
7.8k points

1 Answer

3 votes

Answer:

1. x = ±9

2.
x=\pm √(13)

3. 12 and -12.

4. Antoine is incorrect. There exists two solutions x=5 and x= -5.

Step-by-step explanation:

According to the questions,

Problem 1.
x^(2)-81=0 i.e.
x^(2)=81 i.e. x = ±9.

Problem 2.
2x^(2)-26=0 i.e.
x^(2)-13=0 i.e.
x^(2)=13 i.e.
x=\pm √(13)

Problem 3. [tex]f(x)=x^{2}-144[tex]

To find the roots, we take, [tex]x^{2}-144=0[tex] i.e. [tex]x^{2}=144[tex] i.e. x = ±12.

Thus, the options are 12 and -12.

Problem 4. We have [tex]f(x)=x^{2}+25[tex]

For the roots, we take, [tex]x^{2}+25=0[tex] i.e. [tex]x^{2}=25[tex] i.e. x = ±5.

Thus, Antoine is not correct and two solutions namely x=5 and x= -5 exists.

User Nella
by
7.9k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories