Question

If a = b + 2, then (b - a)⁴ = ?

Answer 1

Use substitution.

anywhere you see "a" , than you would plug in b + 2 in for it so....

(b - (b + 2)^4 

now take the negative sign and distribute it "+"

so b - b is 0, than 0 - (-2) is -2.

so what is (-2)^4     ????? it would become positive 16