Someone help me for this algebra task please

What is the range of the data below? .8090100

Solve each quadratic equation by factoring and using the zero product property. 10x + 6 = -2x^2 -2

Me! i will mark brainliest! i don't get polynomials and all that other stuff. so this question is really hard. multiply and simplify.(x - 4) (x^2 – 5x – 6)show your