Find an equation of the tangent line to the curve at the given point.
2x4 + 4x2 − 7x, (1, -1)
I know i would need to use m = lim f(x)-f(a)
but then i have lim 2x^4+4x^2-7x-1
i am not quite sure how to factor that limit so i can cancel the x-1 and get a equation that i can plug my x=1 value into and get my slope so i can use the formula:
y-h = m(x-a)