If p = -10, find the value of p² – 2p – 100

Simplify these expressions and find their values, if x=3,a=-1,b=-2

(i) 3x – 5 – x + 9

(ii) 2 - 8x + 4x + 4

(iii) 3a + 5 - 8a + 1

(iv) 10 - 3b- 4 - 5b

(v) 2a - 2b – 4 – 5 + a

If z = 10, find the value of z³ – 3(z – 10)

What should be the value of a if the value of 2x² + x - a equals to 5, when x = 0?

Simplify the expression and find its value when a=5 and b = -3, then 2(a² + ab) +3 - ab