Question

(5 + 5x^4) - (x^4 - 2)

Answer 1

(5+5⁴)-(x⁴-2)=

(put out the brackets)

=(5+5x⁴)+(-1)(x⁴)+(-2)(-1)=

=5+5x⁴-x⁴+2=

(combine like terms)

=x⁴(5-1)+(5+2)=

=4x⁴+7 is your answer