Simplify the expression: 2√  20  −   3√  7  −   2√  5  +   4√  63  .           a. 2√  20  −   3√  7  −   2√  5  +   4√  63    b. 2√  20  −   3√  7  +   4√  63    c. 2√  5  +   9√  7    d. 2√  20  −   4√  7  −   2√  5  plz

The input to the function is x and the output is y. write the function such that x can be a vector (use element-by-element operations). a) use the function to calculate y(-1.5) and y(5). b) use the function to make a plot of the function y(x) for -2 ≤ x ≤ 6.