Check/correct my work ! working with polynomials and stuff.

1. multiply and simplify
(b+2)(b+2)
b^2+4

2. multiply and simplify
(x+3)(x+3)
x^2+9

3. simplify
(3xy^3)(2x^3y)
6x^4y^4

Tina practice piano for 15 hours last month and 45 hours this month use multiplication to write a statement comparing me i was tina practice during the two months use addition to write a statement comparing the hours tina practice during the two months

Does the function satisfy the hypotheses of the mean value theorem on the given interval? f(x) = 4x^2 + 3x + 4, [−1, 1] no, f is continuous on [−1, 1] but not differentiable on (−1, 1). no, f is not continuous on [−1, 1]. yes, f is continuous on [−1, 1] and differentiable on (−1, 1) since polynomials are continuous and differentiable on . there is not enough information to verify if this function satisfies the mean value theorem. yes, it does not matter if f is continuous or differentiable; every function satisfies the mean value theorem.

Which value of y will make the inequality y< -1 false?