Question

15x-4{4-[x^2-20x+6]}

Answer 1

15x-4{4-[x^2-20x+6]}

= 15 x − 4 ( 4 + ( − x^ 2 + 20 x − 6 ) )

= 15 x + ( 4 x^ 2 − 80 x + 8 )

= 15 x + 4 x^ 2 − 80 x + 8

= 4 x ^2 − 65 x + 8