expression in quadratic form, algebra homework help

  

1) Write the expression in quadratic form, if possible.a8 + 10a2 – 16a)   (a4)2 + 10(a2) – 16b)    (a2)2 + 10(a2) – 16c)     a2[(a2)2 + 10(a)] – 16d)     cannot be written in quadratic form2) Write the expression in quadratic form, if possible.7b5 – 4b3 + 2ba)   7(b3)2 ­- 4(b3) + 2bb)   b[7(b2)2 ­- 4(b2) + 2]c)    7(b2)3 -­ 4(b)3 + 2(b)d)    cannot be written in quadratic form.