Let m 17 and n23 evaluate the expression

Question

1) Simplify the following expressions:

a) 2a-7b + 15a² + 11b

b) 16^-0.25  8-1/3

c) 4x²(-2x)³/(-2(-x²)³⁾²

d) X^-2(16-x²)(x(x-4))^-1

2. Let m =17 and n=23. Evaluate the expression (m-n)²-2mn/m³-n²

3. Expand the following

a) 9(x-y+3)

b) abc(a²-b²+c²)

c) (r-s+t)(r+s-t)