Question

(5x*2-3x+7)+(4x*2+2x-1)

Answer 1

5x²-3x+7
x=(3±√9-4.5.7)/2.5
x1=(3+√-131)/10
x2=(3-√-131)/10

4x²+2x-1
x=(-2±√4-4.4.-1)/2.4
x1=(-2+2√5)/8=(-1+√5)/4
x2=(-2-2√5)/8=(-1-√5)/4

=> (3+√-131)/10+(3-√-131)/10+ (-1+√5)/4+(-1-√5)/4
6/10 + (-2/4)
3/5 - 1/2= 1/10