If 3x4+2=56.8, what is the value of x?

x≈6.708
x≈−4.323
x≈−2.891
x≈−2.059

Can someone me do math because i am having a breakdown rn because i don’t get it

Does the function satisfy the hypotheses of the mean value theorem on the given interval? f(x) = 4x^2 + 3x + 4, [−1, 1] no, f is continuous on [−1, 1] but not differentiable on (−1, 1). no, f is not continuous on [−1, 1]. yes, f is continuous on [−1, 1] and differentiable on (−1, 1) since polynomials are continuous and differentiable on . there is not enough information to verify if this function satisfies the mean value theorem. yes, it does not matter if f is continuous or differentiable; every function satisfies the mean value theorem.

Arectangular yard has area 96 square feet. if the width of the yard is 4 feet less than the length