Plz asap! ! i will award find the value of x in each case. give reasons to justify your solutions! h∈ig

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)

21 type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar. the solution set of n2 - 14n = -45 is { (separate the solutions with a comma)

Find the area of the triangle formed by the origin and the points of intersection of parabolas y=−3x^2+20 and y=x^2−16.