Simple math problem need help

What is the standard form of -5x^2+2x^4-11+x^3+3x

In two or more complete sentences, formulate how to use technology to calculate the appropriate regression model for the given data. you are not required to find the model, just choose the appropriate regression and explain how to use the technology. (-5,,2.,0.8), (0,-0.5), (2,-1.3), (3,-0.8), (5,2)

What is the value of x in the equation 2(x-4) = 4(2x + 1)?