Prove that (1+2w) (1 +2w ^2)(1-w-w^2)=6Prove that (1+2w) (1 +2w ^2)(1-w-w^2)=6

Step-byp explanation:

x is the answer

  t ≈ 1.697798

Step-by-step explanation:

The linear approximation at t=1.2 is ...

  A ≈ A'(1.2)(t -1.2) +A(1.2)

  ≈ 15.0663(t -1.2) +7.5

We want this to be 15, so we have ...

  15 = 15.0663(t -1.2) +7.5

  7.5/15.0663 = t -1.2 . . . . subtract 7.5, divide by 15.0663

  7.5/15.0663 +1.2 = t ≈ 1.697798