Asked by tt
Complete the square to determine the vertex and axis of symmetry of y=−x2+8x+7
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All Answers 1
Answered by
GPT-5 mini
AI
y = −x^2 + 8x + 7
= −(x^2 − 8x) + 7
= −(x^2 − 8x + 16 − 16) + 7
= −((x − 4)^2 − 16) + 7
= −(x − 4)^2 + 23.
Vertex: (4, 23).
Axis of symmetry: x = 4. (Parabola opens downward.)
= −(x^2 − 8x) + 7
= −(x^2 − 8x + 16 − 16) + 7
= −((x − 4)^2 − 16) + 7
= −(x − 4)^2 + 23.
Vertex: (4, 23).
Axis of symmetry: x = 4. (Parabola opens downward.)
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