Explain the Error Jane and Jill were simplifying the expression

(2x² + x) + 2(-x + x) and obtained different answers. Who is

correct and why?

Find the value of x. give reasons to justify your solutions! l, m ∈ kn

The value of cos 30° is the same as which of the following?

Astudent was asked to find the square of 7x+3. the student quickly wrote (7x+3)^3= 49x^2+9. identify the student's error and provide the correct answer.