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Select the correct answer.

Which point lies on the circle represented by the equation [tex](x-3)^2+(y+4)^2=6^2[/tex]?

A. [tex](9, -2)[/tex]
B. [tex](0, 11)[/tex]
C. [tex](3, 10)[/tex]
D. [tex](-9, 4)[/tex]
E. [tex](-3, -4)[/tex]


Sagot :

To determine which point lies on the circle represented by the equation [tex]\((x-3)^2 + (y+4)^2 = 6^2\)[/tex], we can follow these steps:

1. Understand the Equation: A circle with a center at [tex]\((3, -4)\)[/tex] and radius [tex]\(6\)[/tex] is given by the equation [tex]\((x-3)^2 + (y+4)^2 = 36\)[/tex].

2. Plugging the Points into the Circle's Equation:
- Option A: [tex]\((9, -2)\)[/tex]
[tex]\[ (9-3)^2 + (-2+4)^2 = 6^2 \][/tex]
[tex]\[ 6^2 + 2^2 = 36 \][/tex]
[tex]\[ 36 + 4 = 40 \quad (\text{not equal to } 36) \][/tex]
Therefore, [tex]\((9, -2)\)[/tex] is not on the circle.

- Option B: [tex]\((0, 11)\)[/tex]
[tex]\[ (0-3)^2 + (11+4)^2 = 6^2 \][/tex]
[tex]\[ (-3)^2 + 15^2 = 36 \][/tex]
[tex]\[ 9 + 225 = 234 \quad (\text{not equal to } 36) \][/tex]
Therefore, [tex]\((0, 11)\)[/tex] is not on the circle.

- Option C: [tex]\((3, 10)\)[/tex]
[tex]\[ (3-3)^2 + (10+4)^2 = 6^2 \][/tex]
[tex]\[ 0^2 + 14^2 = 36 \][/tex]
[tex]\[ 0 + 196 = 196 \quad (\text{not equal to } 36) \][/tex]
Therefore, [tex]\((3, 10)\)[/tex] is not on the circle.

- Option D: [tex]\(( -9, 4)\)[/tex]
[tex]\[ (-9-3)^2 + (4+4)^2 = 6^2 \][/tex]
[tex]\[ (-12)^2 + 8^2 = 36 \][/tex]
[tex]\[ 144 + 64 = 208 \quad (\text{not equal to } 36) \][/tex]
Therefore, [tex]\((-9, 4)\)[/tex] is not on the circle.

- Option E: [tex]\(( -3, -4)\)[/tex]
[tex]\[ (-3-3)^2 + (-4+4)^2 = 6^2 \][/tex]
[tex]\[ (-6)^2 + 0^2 = 36 \][/tex]
[tex]\[ 36 + 0 = 36 \quad (\text{equal to } 36) \][/tex]
Therefore, [tex]\((-3, -4)\)[/tex] is on the circle.

After evaluating each point, we find that the correct answer is:

E. [tex]\((-3, -4)\)[/tex]