Write the equation of the tangent line to the curve at the indicated point. As a check, graph both the function and the tangent line.y = x4 − 4x2 + 9atx = 1

Question

Write the equation of the tangent line to the curve at the indicated point. As a check, graph both the function and the tangent line.
y = x4 − 4x2 + 9
at
x = 1

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