Given: x^6+2x^3−35 Model the u-substitution process. Rewrite the equation in quadratic form using 'u'''.

Answer 1

Let u= x^3. So now you have

u^2+2u-35

Answer 2

x^6 + 2 x^3 - 35 = x^6 + 2 x^3 + 1 - 1 - 35 = (x^3 + 1)^2 - 36 or (x^3 + 1)^2 - 6^2