Question

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7. Add or subtract the following polynomials:
a. 5x2 + 3y3 - 4x2 =
b. y3 + 2y3 - 8 + 2 =
c. 9-3x - 4x + 2x - 12 =
d. -6t + 4+2 -16 + 7+ - 4+2 =

Answer 1

a.
`x^(2) + 3y^(3)`

b.
`3y^(3) -6`

c.
`5x -3`

d. -6t - 5

Explanation:

When a number has the same variable as another, you can add or subtract them

So for the first one, you can do

`5x^(2) -4x^(2) = 1x^(2) = x^(2)`

(But don't forget the
`3y^(3)`!)

So it is:

`x^(2) + 3y^(3)`

Continue this process for the rest of them