Answer 1

28x⁴ = 2 × 2 × 7 × x × x × x × x

56x = 2 × 2 × 2 × 7 × x

28x⁴ ÷ 56x  = `(2 xx 2 xx 7 xx x xx x xx x xx x)/(2 xx 2 xx 2 xx 7 xx x) = x^3/2 = 1/2 x^3`